Physics Class 11 Chapter 4 Work And Energy Test - 3

Physics Class 11 Chapter 4
Work And Energy
Test - 3

1. Work done by variable force is determined by dividing?

a) Force into small intervals
b) Displacement into small intervals
c) Both force and displacement
d) Force into large and displacement into small intervals

2. Slope of work time graph is equal to?

a) Energy
b) Power
c) Acceleration
d) Displacement

3. An elevator weighing 3.5x106 N is raised to a height of 1000 m in the absence of friction, the work is?

a) 3.5x10⁹J
b) 3.5x10⁴J
c) 3.5x10⁸J
d) 3.5x10⁶J

4. Work done on the body is equal to?

a) Neither change in K.E nor P.E
b) Change in both K.E and P.E
c) Change in its K.E always
d) Change in its P.E

5. The tides raise the mater in the sea roughly in a day?

a) Twice
b) Eight times
c) ne
d) Four times

6. Proton electron, neutron and alpha particles having same momentum which one has high K.E?

a) Neutron
b) Alpha
c) Proton
d) Electron

7. The escape velocity of a body in gravitational field of earth is independent of?

a) Mass and angle at which it is thrown
b) Gravitational field of earth
c) The angle at which it is thrown
d) its mass

8. The average power and instantaneous power become equal if work done at?

a) Variable rate
b) Constant rate
c) Uniform rate
d) Any rate

9. Relation of horse power and watt is?

a) 1hp=746 watts
b) 1hp=546 watts
c) 1hp=946 watts
d) 1hp=1000 watts

10. Biomass can be converted into fuels by?a) Both
b) Direct combustion
c) None of these
d) Fermentation

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