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Physics Mcqs Online Test 8

Physics Mcqs Online Test 8 Preparation Question Answer

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

its mass
the angle at which it is thrown
both its mass and the angle at which it is thrown
gravitational field of earth

Correct!

Wrong!

If velocity is doubled then?

. momentum increases 4 times and K.E increases 2 times
momentum and K.E. remain same
momentum increases 2 times and K.E increases constant
momentum increases 2 times and K.E increases 4 time

Correct!

Wrong!

Gravitational P.E of a body has?

no formula
a formula mgh only .
a formula
no general formula

Correct!

Wrong!

The source of geothermal energy is?

decay of radioactive element in the earth
compression of material in the earth
residual lost of the earth
all as said in a - b and c

Correct!

Wrong!

Work done on the body equals to the?

change in its K.E always
change in its P.E always
change in its K.E and change in its P.E
neither change in K.E and nor change in its P.E

Correct!

Wrong!

Work done by variable force is determine by dividing?

force into small interval
displacement into small interval
both force and displacement into small intervals
force into small and displacement into large intervals

Correct!

Wrong!

The highest value of escape velocity in solar system is planet?

Earth .
Neptune
Jupiter
Moon

Correct!

Wrong!

When the speed of a moving body is doubled then?

its K.E is doubled
its acceleration is doubled
its P.E is doubled
its momentum is doubled

Correct!

Wrong!

The tides raise the mater in the see roughly in a day?

once
twice
four time
eight time

Correct!

Wrong!

Work done by the force of friction is?

always positive
always negative .
positive only for small frictional force
positive only for large frictional force

Correct!

Wrong!

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