GENERAL INSTRUCTIONS (Please read the following instructions very carefully)
1. Question marks are mentioned with each Question.
2. Please write neat and clean hand-writing on Answer Sheet. Use Margin on right side and left side of Answer Sheet.
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4. Do not click the button Submit Test before completing the paper on Answer Sheet.
5. This is a ONE TIME attempt test. Once started, it cannot be reversed or attempted again.
6. Take photo of all the Sheets and make single pdf file.
1
The K.E. of a body is increased most by doubing
mass
weight
speed
density
2
Identify the unit of energy ____________.
Ohms
Newton
watt
joule
3
Work is a form of ______________
force
displacement
energy
None of these
4
A bird flying in the sky has-
K.E. only
P.E. only
neither K.E. nor P.E.
both K.E. and P.E.
5
1 kWh equals to ______________________.
3600 J
36000 J
3.6 X 102 J
3.6 X 106 J
6
If a boy weghing 450 N climbs up a rope through a height of 1m in 1s, what is the power exerted by him?
450 W
110 W
300 W
75 W
7
Energy is measured in the same units as __________________
Power
Force
Work
None of the above
8
Assertion : Ther work done during a round trip is always zero.
Reason : Displacement of body in round trip is zero.
Both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
Both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
Assertion is correct but Reason is incorrect.
Assertion is incorrect but Reason is correct.
9
An object possesses a potential energy of 135 J and kinetic energy of 25 J . The mechanical energy in an object will be _______________
135 J
25 J
160 J
Can not be calculated
10
1 joule = ______________ ergs
11
The work done in lifting a mass of 1 kg to a height of 9.8 m is
1 J
9.8 J
none of these
12
The kinetic energy of a body will become eight times if _________________
its mass is made four times
its velocity is made four times
both the masss and velocity are doubled
both the mass and velocity are made four time
13
1 kilowatt hour is equal to
1 joule
100 joule
36 joule
kilo joule
14
A ball of mass 200g falls from a height of 5m. What is its K.E..When it just reaches the ground ?
98 J
980 J
15
Which of the following statements are not true for gaining elastic potential energy.
1. Due to a change in the shape of body.
2. By stretching an object
3. By compressing an object
4. By bending an object
5. By pushing an object
6. By twisting an object
Only 1 and 3
Only 2 and 4
Only 3
Only 5
16
Which of the following statements are true
1. The energy stored in a stretched rubber band or a spring is elastic potential energy.and is equal to the work done in stretching the rubber band or spring.
2. When this deformed body is released, it attains its original shape and the potential energy is converted into some other form, usually in kinetic energy.
3. Elastic potential energy is never negative whether due to extension or to compression. instrument works on the principle of elastic potential energy.
Only 1
Only 2
All of these
17
Which of the following is a unit of work done?
Nm
J
18
Wnen the speed of a moving object doubled, its ________________
acceleration is doubled
weight is doubled
kinetic energy is doubled
kinetic energy increases 4 times.
19
The work done is minimum when the body is ____________
pushed over an inclined plane
lifted vertically upward
pushed over the smooth rollers
pushed on a plane horizontal surface.
20
Three stationary object A, B and C are tied together of mass 1.5 kg, 3 Kg and 500g possesses 50 J of energy at a certain height. What is the height?
0.1 m
1 m
10 m
20 m