# ECAT/ECAT Physics Work And Energy Mcqs Questions Sample Test,Sample questions

## Question: ` Gravitational P.E of a body has`

1.no formula

2.a formula mgh only

3.a formula

4.no general formula

1.1600 ms-1

2.50.6 ms-1

3.71.6 ms-1

4.2263ms-1

1.displacement

2.acceleration

3.power

4.energy

1.4.2 km S-1

2.7.5 km S-1

3.9.5 km S-1

4.1.1 km S-1

## Question: ` When arrow is released form its bow its energy is transformed from`

1. heat energy to K.E

2.elastic P.E to K.E

3.elemical energy to elastic P.E

4.K.E to elastic P.E.

## Question: ` When two protons are brought together`

1.Kinetic energy increases

2.P.E. between them increases

3.P.E. between them decreases

4.P.E. between tem does not change

1.38.2 J

2.392.1 J

3.39.2 J

4.3.92 J

## Question: ` If velocity is doubled then`

1.momentum increases 4 times and K.E increases 2 times

2.momentum and K.E. remain same

3.momentum increases 2 times and K.E increases constant

4.momentum increases 2 times and K.E increases 4 time

1.Proton

2.electron

3.neutron

4.a-particle

## Question: ` The escape velocity of a body in gravitational field of earth is independent of`

1.cits mass

2.the angle at which it is thrown

3.both its mass and the angle at which it is thrown

4.gravitational field of earth

1.Earth

2.Neptune

3.Jupiter

4.Moon

## Question: ` The source of geothermal energy is`

1.decay of radioactive element in the earth

2.compression of material in the earth

3.residual lost of the earth

4.all as said in a - b and c

1.positive

2.negative

3.zero

4.none of these

1.zero

2.minimum

3.infinity

4.maximum

1.friction

2.electric

3.gravitational

4.magnetic

## Question: ` Which of the following types of force can do no work on the particle on which it acts?`

1.frictional force

2.gravitational force

3.elastic force

4.centripetal force

## Question: ` Work done by variable force is determine by dividing`

1.force into small interval

2.displacement into small interval

3.both force and displacement into small intervals

4.force into small and displacement into large intervals

## Question: ` Work done on the body equals to the`

1.change in its K.E always

2.change in its P.E always

3.change in its K.E and change in its P.E

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

1.45?

2.90?

3.180?

4.0?

## Question: `A field in which the work done in a moving a body along closed path is zero is called`

1.electric field

2.conservative field

3.electromagnetic field

4.gravitational field

## Question: `A man lifts vertically a weight of 40kg through 1m in 10s; while a chile lifts vertically a weight of 10kg through a distance of 1m in 1s. What will be correct inference?`

1.man does more work than child

2.child does more work than man

3. both do the same amount of work

4. it is a foolish question

1.3.5 x 103 J

2.3.5 x 104 J

3.3.5 x 106 J

4.3.5 x 109 J

## Question: `Biomass can be converted into fuels by`

1.direct combustion

2. fermentation

3.both (a) and (b)

4.none of these

## Question: `Geothermal energy is a ____________________ source of energy.`

1.non-renewable

2.stable

3.renewable

4.none of the above

## Question: `he source of tidal energy is`

1.sun

2.earth

3.both (a) and (b)

4.moon

1.1.44kw/m2

2.1.4kw/m2

3.1 kw/m2

4.none

1.36 x 106 J

2.36 x 1012 J

3.36 x 109 J

4.36 x 108 J

## Question: `Propulsion force of a rocket is`

1. non-conservative force

2.conservative force

3.both (a) and (b)

4.none of these

1.area

2.work done

3.power

4.none of these

## Question: `The average power and instantaneous power become equal if work is done at`

1.any rate

2.at variable rate

3.at uniform rate

4.at high rate

1.120 J

2.60 J

3.30 J

4.0.02 J

1.[ML2T-3]

2.[ML2T-2]

3.[ML2T3]

4.none of these

1.power

2.work

3.impulse

4.torque

## Question: `The relation between horse power and watt is`

1.1 hp = 546 watts

2.1 hp = 746 watts

3.1 hp = 1000 watts

4.1 hp = 946 watts

1.V esc = 1/2Vo

2.V esc = ?2 Vo

3. V esc = Vo

4.V esc = 2Vo

1.once

2.twice

3.four time

4.eight time

1.once

2.twice

3.four time

4.eight time

## Question: `Work done by the force of friction is`

1.always positive

2.always negative

3.positive only for small frictional force

4.positive only for large frictional force

## Question: `Work has the dimension as that of same as that of`

1.torque

2.angular momentum

3.linear momentum

4.power

1.rotory

2.photovoltaic

3.galvanic

4.none of these

## More MCQS

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