Physics MCQ (Multiple Choice Questions) - SchoolingAxis

Physics MCQ (Multiple Choice Questions)

 Que- The unit for measuring electric power is the 

a. Steridian 

b. Watts 

c. Watts 

d. Volts 

Answer- Watts

Que- The device used to change the speed of an electric fan is 

a. Amplifier 

b. Regulator 

c. Switch 

d. Rectifier 

Answer- Regulator

Que- The material used in electric heater is 

a. Tungsten 

b. Nichrome 

c. Brass 

d. Steel 

Answer- Nichrome

Que- After long periods of use, a grey spot develops on the inside of a bulb. This is because 

a. The tungsten filament evaporates and collects there 

b. The heat of the bulb scorches the glass at the top 

c. Dust inside the bulb condenses on the top 

d. Glass undergoes a change due to the heat 

Answer- Dust inside the bulb condenses on the top

Que- What is the wavelength of visible spectrum ? 

a. 1300 A°–3000 A° 

b. 3900 A° – 7600 A° 

c. 7800 A° – 8000 A° 

d. 8500 A° – 9800 A° 

Answer- 3900 A° – 7600 A°

Que- Which layer of the earth's atmosphere reflect back the radio waves to the earth's surface ? 

a. Ionosphere 

b. Stratosphere 

c. Mesosphere 

d. Exosphere 

Answer- Ionosphere

Que- Where are mesons found ? 

a. Cosmic rays 

b. X-rays 

c. Gamma rays 

d. Laser beam 

Answer- Cosmic rays

Que- Who discovered X-ray? 

a. Marie Curie  

b. Pierre Curie  

c. Wilhelm Roentgen  

d. Ernest Rutherford  

Answer- Wilhelm Roentgen 

Que- Which of the following has the lowest frequency? 

a. Visible light 

b. Gamma rays 

c. Xrays 

d. Ultra violet rays 

Answer- Visible light

Que- Which of the following represents a relation for ''heat lost = heat gained'? 

a. Principle of thermal equilibrium 

b. Principle of colors 

c. Principle of calorimetry 

d. Principle of vaporization 

Answer- Principle of calorimetry

Que- Q = mcdT refers to 

a. Enthalpy formula 

b. Heat Transfer formula 

c. Specific Heat formula 

d. Heat of Vaporization 

Answer- Specific Heat formula

Que- Steam at 100°C causes more severe burns than water at 100°C because 

a. Steam has no specific heat capacity 

b. Steam has latent heat of vaporisation 

c. Water has no specific heat capacity 

d. Water has latent heat of fusion 

Answer- Steam has latent heat of vaporisation

Que- No current will flow between two charged bodies if they have the same  

a. Resistance 

b. Charge 

c. Potential 

d. Charge/ potential ratio 

Answer- Potential

Que- Two metallic wires made from copper have same length but the radius of wire 1 is half of that of wire 2. The resistance of wire 1 is R. If both the wires are joined together in series, the total resistance becomes 

a. 2R 

b. R/2 

c. 5R/4 

d. 3R/4 

Answer- 5R/4

Que- Which of these liquids has the highest viscosity? 

a. Milk 

b. Syrup 

c. Pineapple juice 

d. Water 

Answer- Syrup

Que- The absorption of ink by blotting paper involves 

a. Viscosity of ink 

b. Diffusion of ink through the blotting 

c. Capillary action phenomenon 

d. Siphon action 

Answer- Capillary action phenomenon

Que- Water from soil enters into the root hairs owing to : 

a. Atmospheric pressure 

b. Capillary pressure 

c. Root pressure 

d. Osmotic pressure 

Answer- Capillary pressure

Que- Which of the following liquids has the least density ? 

a. Fresh water 

b. Salt water 

c. Petrol 

d. Mercury 

Answer- Petrol

Que- A small drop of oil spreads over water because : 

a. Oil has a higher surface tension 

b. Water has a higher surface tension 

c. Oil has a higher viscosity 

d. Water has a higher viscosity 

Answer- Water has a higher surface tension

Que- An object at rest may have 

a. Momentum 

b. Potential energy 

c. Velocity 

d. Kinetic energy 

Answer- Potential energy

Que- Which conservation principle is applicable in the case of the motion of a rocket? 

a. Conservation of mass 

b. Conservation of charge 

c. Conservation of momentum 

d. Conservation of energy 

Answer- Conservation of momentum

Que- Rocket works on the principle of 

a. Newton's Third Law 

b. Newton's First Law 

c. Newton's Second Law 

d. Archimedes Principle 

Answer- Newton's Third Law

Que- A passenger standing in a bus is thrown outward when the bus takes a sudden turn. This happens due to 

a. Outward pull on him 

b. Inertia of motion 

c. Change in momentum 

d. Change in acceleration 

Answer- Inertia of motion

Que- When a running car stops suddenly, the passengers tends to lean forward because of: 

a. Centrifugal force 

b. Inertia of rest 

c. Inertia of motion 

d. Gravitational force 

Answer- Inertia of motion

Que- The surface tension of water on adding detergent to it 

a. Increases 

b. Decreases 

c. No change 

d. Becomes zero 

Answer- Decreases

Que- A bottle of sodalime is grasped by the neck and swung briskly in a vertical circle, Near which portion of the bottle do the bubbles collect? 

a. Near the bottom 

b. In the middle of the bottom 

c. Near the neck 

d. Bubbles remain distributed uniformly 

Answer- Near the neck

Que- Which liquid is the most viscous? 

a. Water 

b. Diesel 

c. Milk 

d. Oil 

Answer- Oil

Que- Rain drops acquire spherical shape due to  

a. Viscosity 

b. Surface tension 

c. Friction 

d. Elasticity 

Answer- Surface tension

Que- The fact that two large ships travelling on close parallel courses in the same direction tend to move towards each other can be explained by 

a. Bernoulli's principle 

b. Magnetic properties of the ship's material 

c. Newton's third law of motion 

d. Earth's gravitational force 

Answer- Bernoulli's principle

Que- Why do birds not have respiratory trouble at the time of flying at high altitude ? 

a. Their lungs are very large 

b. They fly inactively 

c. They have extra air sacs 

d. They use less oxygen 

Answer- They have extra air sacs

Que- When a barometer reading suddenly recedes, it indicates that climate– 

a. Will be very warm 

b. Will be extremely stormy 

c. Will remain cold 

d. Incessant rain for at least 48 

Answer- Will be extremely stormy

Que- When a barometer is rising air pressure is 

a. Increasing 

b. Decreasing 

c. Constant 

d. Zero 

Answer- Increasing

Que- The pressure exerted by a 760 mm column of mercury at 0°C is known as 

a. 1 pascal 

b. 1 atmosphere 

c. 1 bar 

d. 1 poise 

Answer- 1 pascal

Que- If a barometric reading is falling, this usually indicates what 

a. Increasing pressure 

b. Decreasing pressure 

c. No pressure 

d. None 

Answer- Decreasing pressure

Que- In a Laser (say neon laser) all the atoms emit the light waves of 

a. Same frequency 

b. Same amplitude 

c. Same phase 

d. All of the above 

Answer- All of the above

Que- The Laser is a beam of radiations which are 

a. Non-coherent and monochromatic 

b. Coherent and monochromatic 

c. Non-coherent and non-monochromatic 

d. Coherent and non-monochromatic 

Answer- Coherent and monochromatic

Que- In quantum mechanics a particle is represented by a 

a. Wave  

b. Wave packet  

c. Particle  

d. None of the above  

Answer- Wave packet 

Que- The p wave of a normal Electrocardiogram indicates 

a. Atrial depolarization 

b. Ventricular repolarization 

c. Atrial repolarization 

d. Ventricular depolarization 

Answer- Atrial depolarization

Que- Which of the following phenomenon helps to conclude that light is a transverse wave? 

a. Interference 

b. Diffraction 

c. Polarisation 

d. Refraction 

Answer- Polarisation

Que- The wave like properties of electrons are useful in 

a. Magnifying objects 

b. Lasers 

c. Weather reports 

d. All of the above 

Answer- Magnifying objects

Que- Who indirectly determined the mass of the electron by measuring the charge of the electron? 

a. Thomson  

b. Millikan  

c. Rutherford  

d. Einstein  

Answer- Millikan 

Que- When an atom loses an electron it becomes 

a. Neutron 

b. Negative ion 

c. Positive ion 

d. None of the above 

Answer- Positive ion

Que- What is the size of Electron as comapared to Proton and Neutron? 

a. 1/355  

b. 1/1236  

c. 1/1836  

d. 1/1923  

Answer- 1/1836 

Que- The force that binds the neutrons and protons in a nucleus is called as: 

a. Weak Nuclear Force 

b. Strong Nuclear Force 

c. Electromagnetic Force 

d. Gravitational Force 

Answer- Strong Nuclear Force

Que- Two rods, one of copper and other of steel, experience the same upthrust when placed in water.Thus, both have 

a. Equal volume 

b. Equal weight 

c. Equal density 

d. Equal mass 

Answer- Equal volume

Que- If ice floating on water in a vessel melts, the water level in the vessel ________ . 

a. Increases 

b. Does not change 

c. First increases before decreasing 

d. Decreases 

Answer- Does not change

Que- On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because 

a. Mercury is a metal 

b. Density of mercury is greater than that of water 

c. Cohesion of mercury is greater than its adhesion with glass 

d. Cohesion of water is greater than its adhesion with glass 

Answer- Cohesion of mercury is greater than its adhesion with glass

Que- The velocity of falling rain drops attains a terminal value because of 

a. Surface tension  

b. Air current  

c. Upward thrust due to air  

d. Viscous force exerted by air  

Answer- Viscous force exerted by air 

Que- Which one is the unit of surface tension of a liquid 

a. Newton /m2  

b. Electron volt /cm2  

c. Joule/ mm  

d. None of the above  

Answer- Electron volt /cm2 

Que- A white and smooth surface is 

a. Good absorber and good reflector of heat 

b. Bad absorber and good reflector of heat 

c. Good absorber and bad reflector of heat 

d. Bad absorber and bad reflector of heat 

Answer- Bad absorber and good reflector of heat

Que- The atmosphere is heated mainly by 

a. Insolation 

b. Conduction 

c. Radiation 

d. Convection 

Answer- Radiation

Que- The direction of heat flow between two objects depends on 

a. Their masses 

b. Their heat contents 

c. Their temperatures 

d. Whether they are in solid, liquid or gaseous state 

Answer- Their temperatures

Que- Woollen cloth protects the body from cold because 

a. It is a good conductor of heat 

b. It is a poor conductor of heat 

c. External heat rays enter into the body through the woollen cloth 

d. It reflects heat 

Answer- It is a poor conductor of heat

Que- Hot water is poured simultaneously in four metallic tumblers painted outside with different paints. After some time the water will be found to have cooled most in the tumbler painted. 

a. Rough white 

b. Rough black 

c. Shining white 

d. Shining black 

Answer- Rough black

Que- What factors contribute to global winds? 

a. Coriolis Effect 

b. Convection Cells 

c. Uneven warming of the earth by the sun 

d. All of the above 

Answer- All of the above

Que- Two metallic plate of equal thickness and coefficient thermal conductivity K1 and K2 put together face to face. A common plate is constructed. What is equivalent K?  

a. K1k2/k1+k2 

b. 2k1k2/k1+k2 

c. K1+k2/k1k2 

d. None 

Answer- 2k1k2/k1+k2

Que- A spring is an example of which of these 

a. Newton's 3rd law 

b. Hooke's law 

c. Newton's 1st law 

d. Conservation of mass law 

Answer- Hooke's law

Que- A copper disc has a hole. If the disc is heated, the size of the hole 

a. Increases 

b. Decreases 

c. No change 

d. First increases and than decreases 

Answer- Increases

Que- Which measurement describes the pressure of a gas? 

a. 450 mm Hg 

b. 315 K 

c. 251 g/ 

d. None of the above 

Answer- 450 mm Hg

Que- 1 Micron is equal to 

a. 10–9 m 

b. 10–12 m 

c. 10–6 m 

d. 10–15 m 

Answer- 10–6 m

Que- Depth of ocean is measured by 

a. Animometer 

b. Aerometer 

c. Siesmometer 

d. Fathometer 

Answer- Fathometer

Que- 'Parsec' is the unit measurement of 

a. Density of stars 

b. Astronomical distance 

c. Brightness of heavenly bodies 

d. Orbital velocity of giant stars 

Answer- Astronomical distance

Que- Analog synthesis refers to a technology based on 

a. Placing brief digital recordings of live sounds under the control of a synthesizer keyboard. 

b. Interfacing synthesizer equipment. 

c. Representing data in terms of measurable physical quantities. 

d. Representing physical quantities as numbers. 

Answer- Representing data in terms of measurable physical quantities.

Que- Find the resistance (in mega) of a wire of length 20m, cross sectional area 1 cm2 and made of a material of resistivity 200m. 

a. 40 

b. 4000 

c. 80 

d. 2000 

Answer- 40

Que- A copper wire of radius r and length l has a resistance of R. A second copper wire with radius 2r and length l is taken and the two wires are joined in a parallel combination. The resultant resistance of the parallel combination of the two wires will be 

a. 5 R 

b. 5 R/4 

c. 4 R/5 

d. R/5 

Answer- R/5

Que- Which of the following is a good conductor of heat but a bad conductor of electricity ? 

a. Celluloid 

b. Rubber 

c. Asbestos 

d. Mica 

Answer- Mica

Que- When a number of resistors are connected in series in a circuit, the value of current: 

a. Increases 

b. Becomes half 

c. Decreases 

d. Remains the same 

Answer- Remains the same

Que- A good conductor while carrying current is 

a. Alternately charged positive and negative 

b. Negatively charged 

c. Positively charged 

d. Electrically neutral 

Answer- Negatively charged

Que- Sound travels at the fastest speed in 

a. steel 

b. water 

c. air 

d. vacuum 

Answer- steel

Que- Oil raise up the wick in a lamp. The principle involves 

a. the diffusion of oil through the wick 

b. the liquid state of oil 

c. capillary action phenomenon 

d. volatility of oil 

Answer- capillary action phenomenon

Que- Superconductors are substances which 

a. conduct electricity at low temperature 

b. offer high resistance to the flow of current 

c. offer no resistance to the flow of electricity 

d. conduct electricity at high temperatures 

Answer- offer no resistance to the flow of electricity

Que- Light travels at the fastest speed in: 

a. glass 

b. water 

c. hydrogen 

d. vacuum 

Answer- vacuum

Que- Railway tracks are banked on curves 

a. necessary centrifugal force may be obtained from the horizontal component weight of the train 

b. to avoid frictional force between the tracks and wheels 

c. necessary centripetal force may be obtained from the horizontal component of the weight of the train 

d. the train may not fly off in the opposite direction 

Answer- necessary centripetal force may be obtained from the horizontal component of the weight of the train

Que- Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit 

a. X-rays 

b. ultraviolet light 

c. visible light 

d. radio waves 

Answer- visible light

Que- Out of the following pairs, which one does not have identical dimension? 

a. Moment of inertia and moment of a force 

b. Work and Torque 

c. Angular momentum and Planck's constant 

d. Impulse and Momentum 

Answer- Moment of inertia and moment of a force

Que- Mercury is commonly used as a thermometric fluid rather than water because 

a. specific heat of mercury is less than water 

b. specific heat of mercury is more than water 

c. mercury has greater visibility than water 

d. density of mercury is more than the water 

Answer- mercury has greater visibility than water

Que- Optical  fibre works on the 

a. principle of refraction 

b. total internal reflection 

c. scattering 

d. interference 

Answer- total internal reflection

Que- The intensity ratio of waves is 25 : 9. What is the ratio of their amplitudes? 

a. 50 : 18 

b. 25 : 9 

c. 3 : 5 

d. 5 : 3 

Answer- 5 : 3

Que- The velocity of sound in air 

a. Decreases with increase of temperature 

b. Increases with decrease of temperature 

c. Does not depend on temperature 

d. Decreases with decrease of temperature 

Answer- Decreases with decrease of temperature

Que- Infrasonic sound has a frequency lower than 

a. 5 Hz  

b. 15 Hz  

c. 20 Hz  

d. 32 Hz  

Answer- 20 Hz 

Que- When a vibrating tuning fork is placed on a table, a loud sound is heard. This is due to : 

a. Reflection 

b. Refraction 

c. Forced vibrations 

d. Damped vibrations 

Answer- Forced vibrations

Que- Quality of a musical note depends on 

a. Fundamental frequency 

b. Amplitude of the wave 

c. Harmonics present 

d. Velocity of sound in the medium 

Answer- Harmonics present

Que- When a stone is thrown in the calm water of a pond the waves produced on the surface of water in the pond are 

a. Longitudinal 

b. Transverse 

c. Both longitudinal and transverse 

d. Waves are not produced 

Answer- Transverse

Que- When a light wave is reflected from a mirror, there is a change in its 

a. Frequency 

b. Amplitude 

c. Wavelength 

d. Velocity 

Answer- Amplitude

Que- A doppler effect occurs when a source of sound moves 

a. Away from you 

b. Towards you 

c. Both A & B 

d. None of the above 

Answer- Both A & B

Que- Stationary wave is formed by 

a. A transverse wave superposing a longitudinal wave 

b. Two waves of the same speed superposing 

c. Two waves of same frequency travelling in the same direction 

d. Two waves of same frequency travelling in the opposite direction 

Answer- Two waves of same frequency travelling in the opposite direction

Que- Ultrasound devices operate with minimum frequency from 

a. 20kHz  

b. 35 kHz  

c. 45 kHz  

d. 60 kHz  

Answer- 20kHz 

Que- The source of the Sun's energy is the process of 

a. Photoelectric emission 

b. Nuclear fission 

c. Nuclear fusion 

d. Thermionic emission 

Answer- Nuclear fusion

Que- Hot springs are heated geothermally by underlying 

a. Water 

b. Magma 

c. Mitula 

d. None of the above 

Answer- Magma

Que- Which of the following is the cleanest source of energy? 

a. Biofuel 

b. Fossil fuel 

c. Nuclear power 

d. Wind energy 

Answer- Wind energy

Que- The Solar energy produced by 

a. Fusion reaction 

b. Fission reaction 

c. Combustion reaction 

d. None 

Answer- Fusion reaction

Que- The oldest type of energy known to man is 

a. Wind power 

b. Solar power 

c. Tidal energy 

d. Geothermal energy 

Answer- Geothermal energy

Que- What is the phenomenon which established the transverse nature of light ? 

a. Reflection 

b. Interference 

c. Diffraction 

d. Polarisation 

Answer- Polarisation

Que- Golden view of sea shell is due to 

a. Diffraction 

b. Dispersion 

c. Polarization 

d. Reflection 

Answer- Polarization

Que- The light of distant stars is affected by 

a. Interstellar Dust 

b. The Earth's Atmosphere 

c. Both A & B 

d. None of the above 

Answer- Both A & B

Que- A soap bubble shows colours when illuminated with white light. This is due to 

a. Diffraction 

b. Polarisation 

c. Interference 

d. Reflection 

Answer- Interference

Que- Which of the following waves cannot be polarised? 

a. Radio 

b. Ultra violet 

c. Infrared 

d. Ultrasonic 

Answer- Ultrasonic

Que- The coil wire in the electric room heater or electric cooking heater is called ________  

a. Circuit 

b. Element 

c. Filament 

d. Cells 

Answer- Element

Que- The composition of electrician solder is 

a. Lead-37%, tin-63% 

b. Iron-37%, tin-63% 

c. Lead-37%, Steel-63% 

d. Steel-37%, copper-63% 

Answer- Lead-37%, tin-63%

Que- The purpose of choke in tube light is 

a. Induce high voltage 

b. Induce low resistance 

c. Induce high resistance 

d. Induce low voltage 

Answer- Induce high voltage

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