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mcqs of
,
1 : If a car doubles its speed, its kinetic energy will be:
1
:
(a) the same
2
:
(b) doubled
3
:
(c) increased to three times
4
:
(d) increased to four times
2 : The Sl unit of power is:
1
:
(a) joule
2
:
(b) newton
3
:
(c) watt
4
:
(d) second
3 : The power of a water pump is 2 kW. The amount of water it can raise in one minute to a height of 5 metres is:
1
:
(a) 1000 litres
2
:
(b) 1200 litres
3
:
(d) 2400 litres
4
:
(c) 2000 litres
4 : A joule can also be written as:
1
:
(a) kg m * s ^ - 2
2
:
(b) kg ms
3
:
(c) kg * m ^ 2 * s ^ - 3
4
:
(d) kg * m ^ 2 * s ^ - 2
5 : Work done is maximum when the angle between the force F and the displacement d is:
1
:
(a) 0 deg
2
:
(b) 30 deg
3
:
(c) 60 deg
4
:
(d) 90 deg
6 : The magnitude of momentum of an object is doubled, the kinetic energy of the object will:
1
:
(a) double
2
:
(b) increase to four times
3
:
(c) reduce to one-half
4
:
(d) remain the same
7 : The energy possessed by a body by virtue of its position is:
1
:
(a) kinetic energy
2
:
(b) potential energy
3
:
(c) chemical energy
4
:
(d) solar energy
8 : A bullet of mass 0.05 kg has a speed of 300m * s ^ - 1 Its kinetic energy will be:
1
:
(a) 2250 J
2
:
(b) 4500 J
3
:
(c) 1500J
4
:
(d) 1125J
9 : Which of the following is not renewable energy source?
1
:
(a) Hydroelectric energy
2
:
(b) Fossil fuels
3
:
(c) Wind energy
4
:
(d) Solar energy
10 : one house power is equal to :
1
:
740 W
2
:
746W
3
:
750W
4
:
756W
11 : If the direction of motion of the forces is perpendicular to the direction of motion of the body then work done will be:
1
:
Maximum
2
:
Minimum
3
:
zero
4
:
none of above
12 : The work done will be zero when the angel between the force and distance is:
1
:
450
2
:
600
3
:
900
4
:
1800
13 : energy has basic forms:
1
:
newton
2
:
joule
3
:
weber
4
:
newton second
14 : The combination of kinetic and potential energy is called:
1
:
Nuclear energy
2
:
Mechanic energy
3
:
Chemical energy
4
:
Thermal energy
15 : The energy of a body possess by virtue of its motion is called:
1
:
kinetic energy
2
:
potential energy
3
:
chemical energy
4
:
mechanical energy
16 : When a body is lifted through a height h, the work done work on it appears in the form of its:
1
:
Kinetic energy
2
:
Potential energy
3
:
elastic energy
4
:
Geothermal energy
17 : The energy store is an compressed or stretched spring is called:
1
:
Gravitational potential energy
2
:
Elastic potential energy
3
:
thermal potential energy
4
:
chemical potential energy
18 : hammer raised up has energy:
1
:
Potential energy
2
:
Geothermal energy
3
:
waste energy
4
:
chemical energy
19 : Salter Duck has parts:
1
:
Two
2
:
Three
3
:
four
4
:
Five
20 : the energy is the stretched bow is :
1
:
Elastic energy
2
:
Sound energy
3
:
heat energy
4
:
kinetic energy
21 : How many forms potential energy have?
1
:
three
2
:
four
3
:
five
4
:
six
22 : The energy in the chemical of a battery is called:
1
:
Elastic potential energy
2
:
Nuclear energy
3
:
Chemical energy
4
:
Thermal energy
23 : The energy of a body possesses by virtue of its motion is called?
1
:
kinetic energy
2
:
mechanical energy
3
:
potential energy
4
:
chemical energy
24 : The energy does not remain available for doing some useful work and may be called:
1
:
Sound energy
2
:
Geothermal energy
3
:
Chemical energy
4
:
Waste ate energy
25 : The resources of energy which are replaced by new ones after their use are called:
1
:
Dug
2
:
Biomass
3
:
Non-renewable
4
:
Renewable energy
26 : formual of potential energy is :
1
:
PE=mgh
2
:
PE=mg/h
3
:
PE=mh
4
:
PE=mh/g
27 : When water is allowed to fall from height:
1
:
The P.E is changed into K.E.
2
:
The P.E is remain the same
3
:
C) The K.E is changed into P.E
4
:
The p.E becomes zero
28 : Solar cells is also:
1
:
Solar panel
2
:
Solar calculators
3
:
Electric generation
4
:
Photo voltaic cells
29 : Pakistan also run nuclear power station at:
1
:
Karachi
2
:
Chashma
3
:
Lahore
4
:
Both a and b
30 : The energy of body possessed due to its position or deformation is known as:
1
:
mechanical energy
2
:
kinetic energy
3
:
Potential energy
4
:
thermal energy
31 : Formula of work done is :
1
:
w=fxs
2
:
w=Fxt
3
:
w=F/S
4
:
W=t/f
32 : The efficiency percentage of an electric lamp is:
1
:
5 per
2
:
15 per
3
:
10 per
4
:
20 per
33 : one joule is equal to:
1
:
1N/1m
2
:
1N x 1m
3
:
1m/1N
4
:
1N2/1m2
34 : SL unit of energy has ____ basic forms.
1
:
Newton
2
:
Joule
3
:
four
4
:
five
35 : The energy stored in dam is:
1
:
electrical energy
2
:
Potential energy
3
:
Kinetic energy
4
:
thermal energy
36 : Which of the following biggest source of energy:
1
:
Dam
2
:
Sum
3
:
Tumels
4
:
Solar
37 : Which of the following is non- renewable resources?
1
:
Fossil
2
:
Tidal energy
3
:
Geothermal energy
4
:
Solar energy
38 : If the velocity of a body becomes double , then its kinetic energy will:
1
:
remain the same
2
:
Become double
3
:
Become four times
4
:
Becomes half
39 : The electricity produced from the power of falling water is called:
1
:
Hydrogen generation
2
:
Reservoir
3
:
Tumels
4
:
Dams
40 : Which example of kinetic energy is correct:
1
:
Running water
2
:
Waving wind
3
:
Both a and b
4
:
None of these
41 : Which of the following is fossil fuel:
1
:
Oil
2
:
Coal
3
:
Natural gas
4
:
All of these
42 : Which of the following is non- readable resources?
1
:
Fossil fuels
2
:
Tidal energy
3
:
Geothermal energy
4
:
Solar energy
43 : The SL unit of power is called:
1
:
watt
2
:
Second
3
:
ms-1
4
:
ms-2
44 : The dirt which is left over after staining dirty water is called:
1
:
Digester
2
:
Biofuel
3
:
Sewage
4
:
Biomass
45 : Rat of doing work is called:
1
:
Energy
2
:
Torque
3
:
Power
4
:
Moments
46 : Which of the following is pollution free?
1
:
Solar power
2
:
Hydroelectric
3
:
Wind
4
:
Wave power
47 : The energy possessed by a virtue of its position relative to the earth?
1
:
gravitation Potential energy
2
:
Elastic potential energy
3
:
chemical Potential energy
4
:
thermal potential energy
48 : Formula of kinetic energy is :
1
:
K.E=mg
2
:
K.E=1/2*mv^2
3
:
K.E=w/t
4
:
K.E=1m/2v2
49 : The formual of power is:
1
:
P=wt
2
:
P=mv
3
:
P=ma
4
:
P=w/t
50 : The ratio of useful output energy and input energy is called:
1
:
Energy
2
:
Power
3
:
Efficiency
4
:
Biomass
51 : Sl unit of work done is :
1
:
Weber
2
:
newton
3
:
Ns
4
:
joule
Chapter 5 : Work, Energy and Power
Physics 9th MCQs || Ilam Ghar
Physics 9th
