Physics MCQ (Multiple Choice Questions) - SchoolingAxis

Physics MCQ (Multiple Choice Questions)

 Que- What is the angle of projection for which the range and maximum height become equal? 

a. tan-1 1/4 

b. tan-1 4 

c. tan-1 1/2 

d. tan-1 2 

Answer- tan-1 4

Que- The thrust on the rocket in the absence of gravitational force of attraction is  

a. constant 

b. not constant 

c. constant if the rate of ejected gases is constant 

d. constant for short range rocket. 

Answer- constant

Que- When two bodies move toward each other with constant speeds the distance between them decreases at the rate of 6m / sec. If they move in the same direction the distance between them increases at the rate of 4m/sec. Then their speeds are  

a. 5m/s, 1m/s 

b. 3m/s, 3m/s 

c. 6m/s, 1m/s 

d. 4m/s, 2m/s 

Answer- 5m/s, 1m/s

Que- Distance covered by a freely falling body in 2 seconds will be  

a. 4.9 m 

b. 19.6 m 

c. 39.2 m 

d. 44.1 m 

Answer- 19.6 m

Que- The distance covered by a body in time t starting from rest is  

a. at2/2 

b. Vt 

c. a2t/2 

d. at2 

Answer- at2/2

Que- Flight of a rocket in the space is an example of  

a. second law of motion 

b. third law of motion 

c. first law of motion 

d. law of gravitation 

Answer- third law of motion

Que- The trajectory (or path) of a projectile is  

a. straight line 

b. parabola  

c. hyperbola 

d. circle 

Answer- parabola 

Que- At which angle the range of the projectile is maximum 

a. 45 Degree 

b. 60 Degree 

c. 30 Degree 

d. none 

Answer- 45 Degree

Que- The force beared by a wall on which water strikes normally at a speed of 10m/sec and at a discharge of 0.0001m3/sec is. 

a. 1 N 

b. 10 N 

c. 100 N 

d. none 

Answer- 1 N

Que- Time rate of change of momentum is equal to 

a. force 

b. impulse 

c. velocity 

d. both (a) and (c)  

Answer- force

Que- The range of the projectile at 30? and 60? are  

a. equal to 45? 

b. equal to 90? 

c. equal to each other 

d. none of the above 

Answer- equal to each other

Que- Why Ballistic missile fails in some circumstances of precision. 

a. due to their shape 

b. due to air resistance 

c. due to angle of projection  

d. att of these 

Answer- due to air resistance

Que- Work done will be maximum if the angle between the force F and displacement d is  

a. 45 Degree 

b. 90 Degree 

c. 180 Degree 

d. 0 Degree 

Answer- 0 Degree

Que- A field in which the work done in a moving a body along closed path is zero is called  

a. electric field 

b. conservative field 

c. electromagnetic field 

d. gravitational field 

Answer- conservative field

Que- When a force is parallel to the direction of motion of the body, then work done on the body is  

a. zero 

b. minimum 

c. infinity 

d. maximum 

Answer- maximum

Que- Which of the following types of force can do no work on the particle on which it acts? 

a. frictional force 

b. gravitational force 

c. elastic force 

d. centripetal force 

Answer- centripetal force

Que- If a body a mass of 2 kg is raised vertically through 2m, then the work done will be  

a. 38.2 J 

b. 392.1 J 

c. 39.2 J 

d. 3.92 J 

Answer- 39.2 J

Que- An elevator weighing 3.5 x 10-6 N is raised to a height of 1000 m in the absence of friction, the work done is  

a. 3.5 x 103 J 

b. 3.5 x 104 J 

c. 3.5 x 106 J 

d. 3.5 x 109 J 

Answer- 3.5 x 109 J

Que- The average power and instantaneous power become equal if work is done at  

a. any rate  

b. at variable rate 

c. at uniform rate 

d. at high rate 

Answer- at uniform rate

Que- The relation between horse power and watt is  

a. 1 hp = 546 watts 

b. 1 hp = 746 watts 

c. 1 hp = 1000 watts 

d. 1 hp = 946 watts 

Answer- 1 hp = 746 watts

Que- Proton electron neutron and a particles have same momentum. Which of them have highest K.E? 

a. Proton  

b. electron 

c. neutron 

d. a-particle 

Answer- electron

Que- Slope of work time graph is equal to  

a. displacement 

b. acceleration 

c. power 

d. energy 

Answer- power

Que- Work done by variable force is determine by dividing  

a. force into small interval 

b. displacement into small interval 

c. both force and displacement into small intervals 

d. force into small and displacement into large intervals 

Answer- displacement into small interval

Que- Work done on the body equals to the  

a. change in its K.E always

b. change in its P.E always 

c. change in its K.E and change in its P.E 

d. neither change in K.E and nor change in its P.E 

Answer- change in its K.E and change in its P.E

Que- The escape velocity of a body in gravitational field of earth is independent of  

a. its mass 

b. the angle at which it is thrown 

c. both its mass and the angle at which it is thrown 

d. gravitational field of earth 

Answer- both its mass and the angle at which it is thrown

Que- The tides raise the mater in the see roughly in a day  

a. once  

b. twice 

c. four time 

d. eight time 

Answer- twice

Que- The source of geothermal energy is  

a. decay of radioactive element in the earth 

b. compression of material in the earth 

c. residual lost of the earth 

d. all as said in a - b and c 

Answer- all as said in a - b and c

Que- The highest value of escape velocity in solar system is planet  

a. Earth 

b. Neptune 

c. Jupiter 

d. Moon 

Answer- Jupiter

Que- Work done by the force of friction is  

a. always positive 

b. always negative 

c. positive only for small frictional force 

d. positive only for large frictional force 

Answer- always negative

Que- Gravitational P.E of a body has  

a. no formula 

b. a formula mgh only 

c. a formula 

d. no general formula 

Answer- no general formula

Que- If velocity is doubled then  

a. momentum increases 4 times and K.E increases 2 times 

b. momentum and K.E. remain same 

c. momentum increases 2 times and K.E increases constant 

d. momentum increases 2 times and K.E increases 4 time 

Answer- momentum increases 2 times and K.E increases 4 time

Que- When the speed of a moving body is doubled then  

a. its K.E is doubled 

b. its acceleration is doubled 

c. its P.E is doubled 

d. its momentum is doubled 

Answer- its momentum is doubled

Que- One mega watt hour is equal to  

a. 36 x 106 J 

b. 36 x 1012 J 

c. 36 x 109 J 

d. 36 x 108 J 

Answer- 36 x 108 J

Que- Which of the following is not conservative force  

a. friction 

b. electric 

c. gravitational 

d. magnetic 

Answer- friction

Que- Work has the dimension as that of same as that of  

a. torque 

b. angular momentum 

c. linear momentum 

d. power 

Answer- torque

Que- The consumption of energy by a 60 watt bulb in 2 sec is  

a. 120 J 

b. 60 J 

c. 30 J 

d. 0.02 J 

Answer- 120 J

Que- The escape velocity form the earth surface in km S-1 is  

a. 4.2 km S-1 

b. 7.5 km S-1 

c. 9.5 km S-1 

d. 1.1 km S-1 

Answer- 1.1 km S-1

Que- If moon radius is 1600 km and g on its surface is 1.6 ms-2 then the escape velocity on the moon is  

a. 1600 ms-1 

b. 50.6 ms-1 

c. 71.6 ms-1 

d. 2263ms-1 

Answer- 50.6 ms-1

Que- When two protons are brought together  

a. Kinetic energy increases 

b. P.E. between them increases 

c. P.E. between them decreases 

d. P.E. between tem does not change 

Answer- P.E. between them increases

Que- When arrow is released form its bow, its energy is transformed from  

a. heat energy to K.E 

b. elastic P.E to K.E 

c. elemical energy to elastic P.E 

d. K.E to elastic P.E. 

Answer- elastic P.E to K.E

Que- A man lifts vertically a weight of 40kg through 1m in 10s; while a chile lifts vertically a weight of 10kg through a distance of 1m in 1s. What will be correct inference? 

a. man does more work than child 

b. child does more work than man 

c. both do the same amount of work 

d. it is a foolish question 

Answer- child does more work than man

Que- The work done by friction is  

a. positive  

b. negative 

c. zero 

d. none of these 

Answer- negative

Que- The area under the force displacement graph represents  

a. area  

b. work done 

c. power  

d. none of these 

Answer- work done

Que- The dimension of power is  

a. [ML2T-3] 

b. [ML2T-2] 

c. [ML2T3] 

d. none of these 

Answer- [ML2T-3]

Que- Propulsion force of a rocket is 

a. non-conservative force 

b. conservative force 

c. both (a) and (b) 

d. non of these 

Answer- non-conservative force

Que- The dot product of force and velocity is 

a. power  

b. work   

c. impulse 

d. torque 

Answer- power 

Que- Geothermal energy is a ____________________ source of energy. 

a. non-renewable 

b. stable 

c. renewable 

d. none of the above 

Answer- renewable

Que- The source of tidal energy is 

a. sun 

b. earth 

c. both (a) and (b) 

d. moon 

Answer- moon

Que- ________________ cells converts solar energy into electrical energy  

a. rotory 

b. photovoltaic 

c. galvanic 

d. non of these 

Answer- photovoltaic

Que- On a clear day at noon the solar energy reaching the earth is  

a. 1.44kw/m2 

b. 1.4kw/m2 

c. 1 kw/m2 

d. none 

Answer- 1 kw/m2

Que- Biomass can be converted into fuels by 

a. direct combustion 

b. fermentation 

c. both (a) and (b) 

d. none of these 

Answer- both (a) and (b)

Que- The rotational K.E of hoop is equal to the  

a. its translational K.E 

b. half than its translational K.E 

c. double than its translational K.E 

d. four times than its translational K.E 

Answer- its translational K.E

Que- A hoop and disc have same mass and radius. Their rotational K.E are related by an equation  

a. K.Ehoop = K.Edisc 

b. K.Ehoop = 2K.Edisc 

c. K.Ehoop = 1/2K.Edisc 

d. K.Ehoop = 4K.Edisc 

Answer- K.Ehoop = 2K.Edisc

Que- The critical speed of an artificial satellite is  

a. 8 Kms-1 

b. 8.1 Kms-1 

c. 7.9 Kms-1 

d. 8 ms-1 

Answer- 7.9 Kms-1

Que- Geo-stationary satellite completes one rotation around earth in  

a. 3 hours 

b. 6 hours 

c. 12 hours 

d. 24 hours 

Answer- 24 hours

Que- Radius of geo-stationary orbit from center of earth is nearly  

a. 42000km 

b. 36000km 

c. 24000 km 

d. 18000 km 

Answer- 42000km

Que- According to Einstein the gravity interaction is possible between  

a. material objects only 

b. material objects and electromagnetic radiation only 

c. electromagnetic radiations 

d. none of the above 

Answer- material objects and electromagnetic radiation only

Que- One radian is equal to  

a. 67.3 Degree 

b. 57.3 Degree 

c. 87.3 Degree 

d. 60 Degree 

Answer- 57.3 Degree

Que- The direction of linear velocity of body moving in a circle is  

a. along the axis of rotation 

b. along the tangent 

c. directed towards the center 

d. directed away form the center 

Answer- along the tangent

Que- When a body moves in a circle, the angle between its linear velocity and angular velocity is always  

a. 180 Degree 

b. 0 Degree 

c. 90 Degree 

d. 45 Degree 

Answer- 90 Degree

Que- The relation between linear and angular acceleration is  

a. a = a x r 

b. a = r x a 

c. a = a x r 

d. r = a x a 

Answer- a = a x r

Que- When a body is whirled in a horizontal circle by means of a string the centripetal force is supplied by  

a. mass of a body 

b. velocity of body 

c. tension in the string 

d. centripetal acceleration 

Answer- tension in the string

Que- Centripetal force performs  

a. maximum work 

b. minimum work 

c. negative work 

d. no work 

Answer- no work

Que- When a body moves in a circle of radius r with linear speed V its centripetal force is  

a. mV/r2 

b. mV/r 

c. mV2/r 

d. mV2/r2 

Answer- mV2/r

Que- A stone is whirled in a vertical circle at the end of a string. When the stone is at the highest position the tension in the string is  

a. maximum   

b. zero 

c. equal to the weight of the stone 

d. less than the weight of the stone 

Answer- equal to the weight of the stone

Que- The span of broad jump depends upon  

a. mass of the jumper 

b. height of jump  

c. angle of projection 

d. none 

Answer- angle of projection

Que- In case of planets the necessary acceleration is provided by  

a. Gravitational force 

b. frictional force 

c. coulomb force 

d. centripetal force 

Answer- Gravitational force

Que- If a car moves with a uniform speed of 2 ms-1 in a circle of radius 0. 

a. Its angular speed is  

b. 4 rad. S-1 

c. 5 rad. S-1 

d. 1.6 rad. S-1 

Answer- 4 rad. S-1

Que- A body can have consutant velocity when it follows a  

a. elliptical path 

b. circular path 

c. parabolic path 

d. rectilinear path 

Answer- rectilinear path

Que- A cyclist cycling around a circular racing track skids because  

a. the centripetal force upon him is less than limiting friction 

b. the centripetal force upon him is greater then limiting friction 

c. the centripetal force upon him is equal to the limiting friction 

d. the friction between the tyres of the cycle and road vanishes 

Answer- the centripetal force upon him is greater then limiting friction

Que- What is outward force acting on a mass of 10 kg when rotating at one end an inelastic string 10m long at speed of 1m/s? 

a. 1N 

b. 10N 

c. 2N 

d. 100N 

Answer- 1N

Que- If we whirl a stone at the end of a string in the vertical circle, it is likely to break when the stone is  

a. at the highest point 

b. at the lowest point 

c. at any point during motion 

d. at the point where gravity is not acting 

Answer- at the lowest point

Que- A man of weight W is standing on an elevator which is ascending with an acceleration a. The apparent weight of the man is  

a. mg 

b. mg - ma 

c. mg + ma 

d. mg - ma 

Answer- mg + ma

Que- Who discovered the inverse square law for gravity? 

a. Einstein 

b. Galileo 

c. Newtons 

d. Plank 

Answer- Newtons

Que- The planet nearest to the earth is  

a. Venus 

b. Mercury 

c. Uranus 

d. Sun 

Answer- Venus

Que- A satellite moving round the earth constitutes 

a. An inertial frome of reference 

b. non inertial frame 

c. neither inertial nor non inertial 

d. both inertial and non inertial 

Answer- non inertial frame

Que- Minimum number of communication satellites required to cover the whole carth is  

a. 4 

b. 3 

c. 2 

d. 5 

Answer- 3

Que- A body of 2 kg is suspended form the ceiling of an elevator moving up with an acceleration g. Its apparent weight in the elevator will be  

a. 9.8 N 

b. 19.6 N 

c. 129.4 N 

d. 39.2 N 

Answer- 39.2 N

Que- If a body of mass 10 kg is allowed to fall freely, its weight becomes  

a. zero 

b. 89N 

c. 9.8 N 

d. 10N 

Answer- zero

Que- How many days would be in a year if the distance between the earth and the sun were reduced to half of its present value (assuming circular orbit)? 

a. 365 days 

b. 730 days 

c. 329 days 

d. 129 days 

Answer- 129 days

Que- When a body is moving along a circular path it covers a certain angle in a given internal of time. Such type of motion is  

a. vibratory motion 

b. linear motion 

c. rotatory motion 

d. angular motion 

Answer- angular motion

Que- Coefficient of viscosity of honey is greater than 

a. milk 

b. water 

c. tarcoal 

d. water 

Answer- water

Que- The dimensions of coefficient of visocisity are  

a. ML-1T-1 

b. M2L1T1 

c. ML1T-1 

d. M2L-1T-1 

Answer- ML-1T-1

Que- Terminal velocity is  

a. uniform 

b. maximum 

c. uniform and maximum 

d. neither uniform nor maximum 

Answer- uniform and maximum

Que- When body moves with terminal velocity the accereration in the body become  

a. zero 

b. maximum 

c. variable 

d. infinite 

Answer- zero

Que- Terminal velocity of the body is directly proportional to the  

a. radius of the body 

b. diameter of the body 

c. size of the body 

d. square of the diameter of the body 

Answer- square of the diameter of the body

Que- The flow of ideal fluid is always  

a. turbulent  

b. streamline 

c. irregular 

d. straight line 

Answer- streamline

Que- Drag force is given by  

a. Newtons law 

b. Pascals law 

c. Gauss law 

d. Stokes law 

Answer- Stokes law

Que- When fluid is incompressible then  

a. velocity of the fluid is constant 

b. flow of the fluid is straight line 

c. density of the fluid is constant 

d. volume of the fluid is constant 

Answer- density of the fluid is constant

Que- Irregular flow of fluid is called  

a. streamline 

b. turbulent 

c. uniform 

d. laminar 

Answer- turbulent

Que- According to equation of continuity A1V1 = A2V2 = constant. The constant is equal to  

a. flow rate 

b. volume of fluid 

c. mass of fluid 

d. density of fluid 

Answer- flow rate

Que- Equation of continuity is obtained by apply in law of conservation of  

a. mass  

b. energy 

c. momentum 

d. all 

Answer- mass 

Que- Velocity of fluid increases where the pressure is  

a. low  

b. high 

c. constant 

d. changes continuously 

Answer- low 

Que- Speed of efflux can be determined by applying  

a. Bernoulls theorem 

b. Torricellis theorem 

c. venture relation 

d. all 

Answer- Torricellis theorem

Que- Blood vessels are  

a. rigid  

b. not rigid 

c. of glass 

d. of rubber 

Answer- not rigid

Que- Concentration of red cells in blood is about  

a. 25% 

b. 40% 

c. 50% 

d. 75% 

Answer- 50%

Que- A man standing near a fast moving train may fall  

a. on the train 

b. away from the train 

c. towards the train 

d. on himself 

Answer- towards the train

Que- For which position maximum blood pressure in the body have the smallest value ? 

a. standing straight 

b. sitting on chair 

c. sitting on ground  

d. laying horizontally 

Answer- laying horizontally

Que- Two fog droplets have radius 2:3 their terminal velocities are  

a. 4:06 

b. 4:09 

c. 2:09 

d. 4.3 

Answer- 4:09

Que- Burnoullis equation is obtained by applying law of conservation of _ 

a. mass  

b. energy 

c. momentum 

d. fluid 

Answer- energy

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