Physics Test 13

Total Questions: 24

3 - The velocity of a body becomes double then its kinetic energy will

A ) Remain the same
B ) Became double
C ) Become four times ✅
D ) Become half

5 - The kinetic energy of a body of mass 2kg is 25J. Its speed is

A ) 75ms-¹
B ) 50ms-¹
C ) 25ms-¹
D ) 5ms-¹ ✅

6 - Which one of the following converts light energy into electrical energy.

A ) Electric bulb
B ) Electric generator
C ) Photo cell
D ) Electric cell

7 - When a body is lifted through a heigh the work done it appears in the form its

A ) Kinetic energy
B ) Potential energy ✅
C ) Elastic potential energy
D ) Geothermal energy

8 - The energy stored in a coal is

A ) Heat energy
B ) Kinetic energy
C ) Chemical energy ✅
D ) Nuclear energy

9 - The energy stored in a dam is

A ) Electric energy
B ) Kinetic energy
C ) Potential energy ✅
D ) Thermal energy

10 - Einstein's mass energy equation C is the

A ) Speed of sound
B ) Speed of light ✅
C ) Speed of electron
D ) Speed of earth

11 - Rate of doing work is called

A ) Energy
B ) Torque
C ) Power ✅
D ) Momentum

12 - Which device of the following converts light into electrical energy?

A ) Electric bulb
B ) Electric generator
C ) Photo cell ✅
D ) Electric cell

13 - If the velocity of a becomes three time greater than kinetic energy will be

A ) Three times
B ) Nine times ✅
C ) four times
D ) Six times

14 - Energy stored in the Dam's water is

A ) Electrical energy
B ) Kinetic energy
C ) Potential energy ✅
D ) Thermal energy

15 - The Kinetic energy of mass 2 kg is 25J. Its speed will be

A ) 5ms-¹ ✅
B ) 12.5ms-¹
C ) 50ms-¹
D ) 25ms-¹

16 - SI unit of work is

A ) Pascal
B ) Newton
C ) Joule ✅
D ) Watt

17 - Power is equal to

A ) W× t
B ) w/t ✅
C ) w²/t
D ) w/r²

18 - 10 Joule work is done by machine in 5 sec its power

A ) 2 w ✅
B ) 10 w
C ) 25 w
D ) 50 w

19 - Rate of doing work is called

A ) Energy
B ) Torque
C ) Power ✅
D ) Momentum

20 - The energy in the stretched bow is

A ) Elastic P.E ✅
B ) Sound energy
C ) Heat energy
D ) K.E

22 - The efficiency of solar cell is

A ) 3% ✅
B ) 6%
C ) 9%
D ) 12%

23 - One joule is equal to

A ) 1N × 1m ✅
B ) 1N/1m
C ) 1m/1N
D ) 1m²/1N²

24 - One horse power is equal to

A ) 740w
B ) 746w ✅
C ) 750w
D ) 756w