# Physics MCQ (Multiple Choice Questions) - SchoolingAxis

Que- Which of the following has the longest wavelength?

Que- Night photography and photopraphy in mist and fog are possible using

Que- Rainbow is produced when sunlight fall on drops of rain. Which of the following physical phenomena are responsible for this?  I.Diffusion  II.Refraction  III.Internal reflection

a. I, II and III

b. I and II

c. II and III

d. I and III

Que- Natural radioactivity was discovered by

a. Marie Curie

b. Ernest Rutherfor

c. Henri Becquerel

d. Enrico Fermi

Que- Planets are

a. luminous heavenly bodies revolving around a star

b. non-luminous heavenly bodies

c. luminous heavenly bodies that twinkle

d. luminous heavenly bodies that do not twinkle

Que- One nanometer is equal to:

a. 10-6m

b. 10-8m

c. 10-9m

d. 10-5m

Que- Mica is used in electrical appliances such as electric iron because mica is

a. a good conductor of heat but a bad conductor of electricity

b. a bad conductor of heat but a good conductor of electricity

c. a good conductor of heat as well as electricity

d. a bad conductor of heat as well as electricity

Answer- a good conductor of heat but a bad conductor of electricity

Que- A person does some work of 1,000 J in 2 s. His power will be ________

a. 1000W

b. 25W

c. 500W

d. 50W

Que- Which results in an increase in power?

a. Doing more work in less time.

b. Doing less work in more time.

c. Doing less work in less time.

d. Doing more work in more time.

Answer- Doing more work in less time.

Que- What device converts light energy to electrical energy?

a. Photodiode

b. Photovoltaic cell

c. Thermocouple

d. Heliostats

Que- In a water lifting electric pump, we convert

a. Electrical energy into Potential energy

b. Kinetic energy into Electrical energy

c. Kinetic energy into Potential energy

d. Electrical energy into Kinetic energy

Answer- Electrical energy into Potential energy

Que- The device which converts sound energy into electrical energy is called

a. Amplifier

b. Speaker

c. Microphone

d. Transmitter

Que- When a piece of pure silicon is doped with aluminium, then

a. The conductivity of the doped silicon piece will remain the same

b. The doped silicon piece will become n-type

c. The doped silicon piece will become p-type

d. The resistivity of the doped silicon piece will increase

Answer- The doped silicon piece will become p-type

Que- When two semiconductors of p and n-type are brought in contact, they form p-n junction which acts like a/an

a. Conductor

b. Oscillator

c. Rectifier

d. Amplifier

Que- Which one among the following components is used as an amplifying device?

a. Transformer

b. Diode

c. Capacitor

d. Transistor

Que- An integrated circuit is more advantages than a coventional circuit because

a. They make the electric equipments more reliable and easier for servicing

b. A faulty part of a conventional circuit may be difficult to locate and repair

c. If a part of the integrated circuit fails the entire circuit is simply replaced

d. All the above

Que- Which of the following features of a tunnel diode is its drawback?

a. Extremely high frequency response

b. Very wide temperature range of operations

c. Instability due to negative resistance

d. Very low power consumptions

Answer- Instability due to negative resistance

Que- Quality of transmission depends upon

a. Nature of signal only

b. Nature of medium only

c. Both (A) and (B)

d. Neither A nor B

Que- Circuit breaker usually operate under

a. After D. C. component has ceased

b. Transient state of short-circuit current

c. Sub-transient state of short-circuit current

d. Steady state of short-circuit current

Answer- Transient state of short-circuit current

Que- The resistance of the human body (dry condition) is of the order of

a. 101 Ohm

b. 102 Ohm

c. 103 Ohm

d. None of these

Que- Which component of an IED creates an electrical charge?

a. Activator

b. Fuse

c. Explosive

d. Power source

Que- A multimeter is used to measure

a. Current

b. Voltage

c. Resistance

d. All of the above

Que- The boiling point of water depends upon the

a. Atmospheric pressure

b. Volume

c. Density

d. Mass

Que- One bar is equal to

a. 103 Pa

b. 106 Pa

c. 105 Pa

d. 104 Pa

Que- Pressure Cooker cooks faster because

a. Boiling point decreases with rise of pressure

b. It cooks the food at low pressure

c. Higher temperature is attained for cooking

d. The material of the cooker is a good conductor

Answer- Higher temperature is attained for cooking

Que- The weakest of all fundamental forces is

a. Gravitational force

b. Electrostatic force

c. Magnetic force

d. Nuclear force

Que- Which is a correct way to measure wavelength?

a. Nearest peak to peak

b. Nearest peak to nearest trough

c. Nearest trough to peak

d. None of the above

Que- If the phase difference between two points is 120° for a wave with velocity of 360 m/s and frequency 500 Hz, then path difference between the two points is

a. 1 cm

b. 6 cm

c. 12 cm

d. 24 cm

Que- Why are we able to hear short wave broadcasts better than long wave broadcasts ?

a. Short waves are more energetic than long waves.

b. Short waves are unaffected by atmospheric disturbances.

d. By convention, short waves are meant for long distances, whereas long waves are reserved for short distances.

Answer- Short waves are more energetic than long waves.

Que- The frequency of ultrasound wave is typically

a. Above 20 kHz

b. Above 20,000 kHz

c. Below 20 kHz

d. Below 02 kHz

Que- Which of the following has the highest frequency?

a. Cosmic rays

b. X-rays

d. Microwaves

Que- The atmospheric air is held to the Earth by :

a. Gravity

b. Winds

c. Clouds

d. Rotation of the Earth

Que- The pressure of a fluid varies with depth h as P = PQ+pgh, where p is the fluid density. This expression is associated with

a. Pascal's law

b. Newton's law

c. Bernoulli's principle

d. Archimedes' principle

Que- A parachute descends slowly whereas a stone dropped from the same height falls rapidly, because

a. Stone is heavier than parachute

b. Special mechanisms are present in parachute

c. A parachute has a larger surface area and air resistance is more

d. None of these

Answer- A parachute has a larger surface area and air resistance is more

Que- Why does bleeding occur through the nose in high mountainous regions ?

a. The pressure of blood in capillaries is greater than the outside pressure

b. The pressure at high altitudes is greater than that on the plains

c. The blood pressure of a person increases at high altitudes

d. The blood pressure fluctuates and finally decreases drastically

Answer- The blood pressure of a person increases at high altitudes

Que- Which of the following instruments is used to measure humidity ?

a. Kata Thermometer

b. Anemometer

c. Sling Psychrometer

d. Clinical Thermometer

Que- Lightning heats the surrounding air to

a. 300 deg Cent

b. 3000 deg Cent

c. 30000 deg Cent

d. 300000 deg Cent

Que- Which of the following is not an intrusive igneous body?

a. Stock

b. Dike

c. Stope

d. Batholith

Que- The instrument for measuring intensity of earthquakes is called

a. Ediograph

b. Pantagraph

c. Ergograph

d. Seismograph

Que- An instrument that records earthquakes is

a. Ergograph

b. Ediograph

c. Thermograph

d. Seismograph

Que- To prevent damage from lightning, lightning conductors are used on tall structures. The lightning conductor

a. Should be made of a good conductor but can be of any shape

b. Should be in the form of a vertical rod

c. Can be of any shape

d. Should be made of a good conductor like copper with sharp-pointed edges

Answer- Should be made of a good conductor like copper with sharp-pointed edges

Que- In uniform circular motion, the linear velocity is perpendicular to

b. Force

d. Momentum

Que- Flywheel is an important part of a steam engine because it :

a. Accelerates the speed of the engine

b. Helps the engine in keeping the speed uniform

c. Decreases the moment of inertia

d. Gives strength to the engine

Answer- Helps the engine in keeping the speed uniform

Que- The following particles move with same kinetic energy. Which of them has maximum momentum ?

a. Electron

b. Proton

c. Deutron

d. Alpha Particle

Que- Should cars have bumpers that collapse under impact?

a. Yes, since the offending car should get damaged and pay for the mistake

b. No, since it would be very expensive to get the car repaired

c. No, since the colliding car would then ram into the occupants and kill them

d. Yes, since they help to absorb the impact of a collision and keep the occupants safe

Answer- Yes, since they help to absorb the impact of a collision and keep the occupants safe

Que- When the speed of car is doubled, then what will be the braking force of the car to stop it in the same distance ?

a. Four times

b. Two times

c. Half

d. One-fourth

Que- A fresh egg when placed in salt water will

a. Sink and go to the bottom

b. Sink but will not go to the bottom

c. Float

d. Burst

Que- Burns caused by steam are much severe than those caused by boiling water because

a. Steam pierces through the pores of body quickly

b. Steam has latent heat

c. Steam is gas and engulfs the body quickly

d. Temperature of steam is higher

Que- Which of the following has got more heat capacity ?

a. Iron piece

b. Water

c. Gold piece

d. Benzene

Que- Which of the following produces more severe burns ?

a. Boiling water

b. Hot water

c. Steam

d. Melting iceberg

Que- Heat stored in water vapour is

a. Specific heat

b. Latent heat

c. Absolute heat

d. Relative heat

Que- Tape recorder should not be kept near one of the following things :

a. Clock

b. Magnet

c. Electrical switchboard

Que- Eddy current is generated by

a. Conduction

b. Induction

c. Convection

d. Direct Current

Que- Which of the following circuit elements is used to ''block" DC in an electronic circuit ?

a. Resistances

b. Capacitance

c. Inductance

d. Diode

Que- A photostat machine works on

a. Electromagnetic image making

b. Electrostatic image making

c. Magnetic image making

d. Thermal image making

Que- On which of the following techniques photostate machine works ?

a. Magnetic Image—Making

b. Thermal Image—Making

c. Electrostatic Image—Making

d. Electromagnetic Image— Making

Que- Work done in a free expansion process is

a. Minimun

b. 0

c. Maximum

d. None of the above

Que- An object of 10 kg is moving with a speed of 2 m/s. The kinetic energy of the object is

a. 20 J

b. 25 J

c. 10 J

d. 40 J

Que- If both the mass and the velocity of a body is increased to twice of their magnitude, the kinetic energy will increase by

a. 2 times

b. 4 times

c. 8 times

d. 16 times

Que- Kinetic energy depends on

a. The velocity or speed of the moving body.

b. The mass of the moving body

c. The pressure of the moving body

d. Both mass and velocity of the moving body

Answer- Both mass and velocity of the moving body

Que- The device used to convert solar energy into electricity is

a. Photovoltaic cell

b. Daniell cell

c. Electrochemical cell

d. Galvanic cell

Que- Vehicle tyres are inflated properly

a. To ensure smooth running.

b. To allow the vehicle to take more load.

c. To avoid skidding and to minimise friction

d. To go fast and save fuel.

Answer- To avoid skidding and to minimise friction

Que- Friction is caused by the ________ on the two surfaces in contact.

a. Irregularities

b. Smoothness

c. Densities

d. Gaps

Que- Ball bearings are used in cycles, scooters etc to

a. Increase the friction between the wheel and the axle

b. Reduce the friction between the wheel and the axle

c. Reduce the friction between ground and the whee

d. None of the above

Answer- Reduce the friction between the wheel and the axle

Que- The force of friction between two surfaces will increase if:

a. A layer of lubricant is kept between the two surfaces

b. The two surfaces are pressed harder

c. Air gap is created between the two surfaces

d. Irregularities on both the surfaces are removed

Answer- The two surfaces are pressed harder

Que- Rolling friction is caused by ________

a. Non-elastic effects

b. Gravity

c. Power dissipation

d. Buoyancy

Que- The rate of flow of electric charge is measured in

a. Ampere

b. Coulomb

c. Ampere/coulomb

d. Ampere-coulomb

Que- A device which is used to limit the current in an electrical circuit is called a

a. Grid

b. Fuse

c. Hub

d. Conductor

Que- Materials that allow electricity to flow are called

a. Insulators

b. Conductors

c. Electron flows

d. Stimulators

Que- The fundamental scientific principle in the operation of battery is

a. Acid-base interaction

b. Dialysis

c. Dissociation of electrolytes

d. Oxidation-reduction

Que- If the current flowing through a circuit is 0.6 A for 6 mins, the amount of electric charge flowing through it is ________

a. 360C

b. 216 C

c. 60 C

d. 36 C

Que- Rate of change of displacement is known as ________

a. Acceleration

b. Velocity

c. Speed

d. Distance

Que- When a ball is thrown vertically upwards, which of the following quantities remains constant during its motion?

a. Energy

b. Displacement

c. Velocity

d. Acceleration

Que- For a body moving with non-uniform velocity and uniform acceleration

a. Displacement – Time graph is linear

b. Displacement – Time graph is non-linear

c. Velocity – Time graph is nonlinear

d. Velocity – Time graph is linear

Answer- Displacement – Time graph is non-linear

Que- A man standing on a edge of a cliff throws a stone vertically upwards with a certain speed. He then throws another stone downwards with the same speed. Find the ratio of the speeds of the two stones when they hit the ground.

a. 1 : 1

b. 1 : 2

c. 1 : 4

d. Cannot be found from the given information.

Que- Scalar Quantities are

a. Physical quantities which have magnitude only and no direction

b. Physical quantities which have no magnitude only and only direction

c. Physical quantities which have magnitude only and direction

d. Physical quantities which have no magnitude and no direction

Answer- Physical quantities which have magnitude only and no direction

Que- If an ordinary glass tube and a glass capillary tube are both dipped in a beaker of water, water rises in

a. Both

b. Only the glass tube

c. Only the capillary tube

d. Neither

Que- Surface tension in a liquid is due to :

b. Cohesive force between molecules

c. Gravitational force between molecules

d. Electrical force between molecules.

Que- A boat loaded with rocks floats in the middle of a swimming pool. A man in the boat throws the rocks overboard. The level of water in the pool will

a. Increase

b. Decrease

c. Remains the same

d. First decrease and then increase

Que- The oil in the wick of an oil lamp rises up due to:

a. Capillary action

b. Low viscosity of oil

c. Gravitational force

d. Pressure difference

Que- Fog is an example of

a. Gas dispersed in gas

b. Liquid dispersed in gas

c. Solid dispersed in gas

d. Solid dispersed in liquid

Que- Which, of the following radiations has the least wavelength ?

a. X-rays

b. A-rays

c. G-rays

d. B-rays

Que- For Gamma radiation, what stops its penetrating abilities?

b. Steal

c. Concrete

d. All of the above

Que- An atom bomb based upon the principle of ________

a. Nuclear fission

b. Nuclear fussion

c. Controlled chain reaction

d. None of these

Que- The damage of the human body due to radiation (X-rays or gamma rays etc) is measured in :

a. Rems

b. Roentgen

c. Curie

a. Unstable nucleus

b. Stable nucleus

c. Stable electronic configuration

d. Stable electronic configuration

Que- When a steel ball is placed on the surface of mercury, it does not sink because

a. Of the surface tension of mercury

b. Mercury is a semisolid

c. Of the high viscosity of mercury

d. The density of mercury is greater than that of steel

Answer- The density of mercury is greater than that of steel

Que- Clouds float in the atmosphere because of their

a. Low pressure

b. Low density

c. Low viscosity

d. Low temperature

Que- When a ship enters the sea from a river

a. It rises a little

b. It sinks a little

c. It remains at the same level

d. It rises or sinks depending on the material it is made of

Que- The apparent weight of a man in a lift is less the real weight when :

a. The lift is going up with an acceleration

b. The lift is going down with uniform speed

c. The lift is going up with uniform speed

d. The lift is going down with an acceleration

Answer- The lift is going down with an acceleration

Que- A balloon filled with hydrogen will

a. Continue going upwards uninterrupted

b. Reach a particular height and remain floating

c. Burst after reaching some height

d. Reach a particular height and start coming down

Answer- Reach a particular height and remain floating

Que- A piece of ice is floating in water kept in a beaker. When all the ice melts the level of water will

a. First rise and then fall

b. Fall

c. Remain the same

d. Rise

Que- The magnitude of buoyant force depends on the ________ of the fluid.

a. Mass

b. Temperature

c. Volume

d. Density

Que- A solid needle placed horizontally on the surface of the water floats due to

a. Capillary action

b. Water pressure

c. Surface tension of water

d. Viscosity of water

Que- Purity of a metal can be determined with the help of

a. Pascal's law

b. Boyle's law

c. Archimedes principle

d. Conservation of mass principle

Que- Buoyancy depends on

a. The mass of the liquid displaced

b. The mass of the body

c. The depth to which the body is immersed

d. The shaped of the body

Answer- The mass of the liquid displaced

Que- Which one of the following is used for sun glasses ?

a. Pyrex glass

b. Flint glass

c. Crooks glass

d. Crystal glass

Que- Instrument for measuring blueness of the sky or ocean is called ________

a. Bathymeter

b. Ceraunograph

c. Cyanometer

d. Barometer

Que- Photosynthesis takes place faster in

a. Darkness

b. Red light

c. White light

d. Yellow light

Que- In a bipolar junction transistor

a. All the three regions (the emitter, the base and the collector) have equal concentrations of impurity

b. The emitter has the least concentration of impurity

c. The collector has the least concentration of impurity

d. The base has the least concentration of impurity

Answer- The base has the least concentration of impurity