9th Class Physics Chapter No.6 PasPaper MCQs
HAMZA SCIENCE ACADEMY
Physics MCQs Test Class 9th
Chapter # 6
WORK AND ENERGY
1. The kinetic energy of a body of mass 2 Kg is 25J. Its speed
is:
(A)
5 ms-1
(B)
12.5 ms-1
(C)
25 ms-1
(D) 50 ms-1
2. Which one of the following converts light energy into
electrical energy?
(A)
Electric bulb
(B) Electric generator
(C) Photocell
(D) Electric cell
3.
The
energy stored in coal is:
(A)
Heat energy
(B)
Kinetic energy
(C)
Chemical energy
(D) Nuclear energy
4. The energy stored in a dam is:
(A)
Electric energy
(B)
Potential energy
(C)
Kinetic energy
(D) Thermal energy
5.
In
Einstein’s mass-energy equation, C is the:
(A)
Speed of sound
(B)
Speed of light
(C)
Speed of electron
(D) Speed of earth
6.
Rate
of doing work is called:
(A)
Energy
(B)
Torque
(C)
Power
(D) Momentum
7.
The
work will be zero, if angle between force and distance is:
(A)
60°
(B)
45°
(C)
180°
(D)
90°
8. The SI unit of work is:
(A)
Newton
(N)
(B)
Joule (J)
(C)
Watt (W)
(D)
Pascal (Pa)
9. The work down in lifting a brick of mass 2Kg through a
height of 5m above ground will be:
(A)
2.5 J
(B)
10 J
(C)
50 J
(D) 100 J
10. If the velocity of a body becomes three times greater, then
kinetic energy will be:
(A)
Three
times
(B)
Nine times
(C)
Four times
(D) Six times
11. Kinetic energy is directly proportional to the velocity of a
body:
(A)
Square
(B)
Two times
(C)
Three times
(D) Four times
12. 10 Joules of work is done by a machine in 5 seconds. Its
power will be:
(A)
2 W
(B)
10 W
(C)
25 W
(D) 50 W
13.
Power
is equal to:
(A)
W
t
(B)
(C)
(D)
14. One horse power is equal to:
(A)
764 W
(B)
746 W
(C)
1000 W
(D) 1100 W
15. The energy possessed by a body by virtue of its motion is
called:
(A)
Nuclear
energy
(B)
Chemical energy
(C)
Kinetic energy
(D) Potential energy
16. The energy in the stretched bow is:
(A)
Elastic
P.E
(B)
K.E
(C)
Heat energy
(D) Sound energy
17. MW is equal to:
(A) 102 W
(B) 104 W
(C) 106 W
(D)
108 W
18. There is a hot molten part, deep in the earth is called:
(A)
Lava
(B)
Magma
(C)
Mixture
(D) Plasma
19.
The
source to produce pollution free electricity is:
(A)
Coal
(B)
Oil
(C)
Wind turbine
(D) Radioactivity
20.
One
mega joule is equal to:
(A) 103 J
(B) 106 J
(C) 109 J
(D) 10-3 J
21. One kilo joule is:
(A)
10 J
(B)
100 J
(C)
1000 J
(D) 10000 J
22.
If
the velocity of a body becomes double, then its kinetic energy will be:
(A)
Remains the same
(B)
Becomes double
(C)
Becomes four times
(D) Becomes half
23. Work will be maximum when the
angle b/w force and displacement will be:
(A)
90
(B)
0
(C)
60
(D) 180
24.
Hammer raised up has energy:
(A) P.E
(B) K.E
(C) sound energy
(D) Heat energy
25.
Percentage of efficiency in solar
cell:
(A) 3%
(B) 6%
(C) 8%
(D) 12%
26.
The formula of kinetic energy is:
(A) m
(B) mgh
(C) 1/2m
(D) mv
27.
The unit of energy is:
(A) Newton
(B) Joule
(C) Meter
(D) Second
28.
Formula of potential energy is:
(A) Pmg
(B) mg
(C) mgh
(D) mah
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