Work And Energy MCQs

Option A: 3.5 x 10-3 J

Option B: 3.5 x 104 J

Option C: 3.5 x 106 J

Option D: 3.5 x 109 J

Correct Answer: 3.5 x 10-3 J ✔

Option A: Twice

Option B: Thrice

Option C: Four times 

Option D: Sixteen times

Correct Answer: Four times  ✔

Option A: 22N

Option B: 16N

Option C: 20N

Option D: 4N

Correct Answer: 22N ✔

Option A: 0.125 J

Option B: 0.250 J

Option C: 0.50 J

Option D: 1 J

Correct Answer: 0.250 J ✔

Option A: direct combustion

Option B: fermentation

Option C: both A and B

Option D: none of these

Correct Answer: both A and B ✔

Option A: rotory

Option B: photovoltaic

Option C: galvanic

Option D: non of these

Correct Answer: photovoltaic ✔

Option A: non-renewable

Option B: stable

Option C: renewable

Option D: none of the above

Correct Answer: renewable ✔

Option A: non-conservative force

Option B: conservative force

Option C: both A and B

Option D: none of these

Correct Answer: non-conservative force ✔

Option A: area

Option B: work done

Option C: power

Option D: none of these

Correct Answer: work done ✔

Option A: man does more work than child

Option B: child does more work than man

Option C: both do the same amount of work

Option D: it is a foolish question

Correct Answer: child does more work than man ✔

Option A: Kinetic energy increases

Option B: P.E. between them increases

Option C: P.E. between them decreases

Option D: P.E. between tem does not change

Correct Answer: B. P.E. between them increases ✔

Option A: V esc = 1/2Vo

Option B: V esc = -2 Vo

Option C: V esc = Vo

Option D: V esc = 2Vo

Correct Answer: V esc = -2 Vo ✔

Option A: torque

Option B: angular momentum

Option C: linear momentum

Option D: power

Correct Answer: torque ✔

Option A: 36 x 106 J

Option B: 36 x 1012 J

Option C: 36 x 109 J

Option D: 36 x 108 J

Correct Answer: 36 x 108 J ✔

Option A: its K.E is doubled

Option B: its acceleration is doubled

Option C: its P.E is doubled

Option D: its momentum is doubled

Correct Answer: its momentum is doubled ✔

Option A: no formula

Option B: a formula mgh only

Option C: a formula

Option D: no general formula

Correct Answer: no general formula ✔

Option A: Earth

Option B: Neptune

Option C: Jupiter

Option D: Moon

Correct Answer: Jupiter ✔

Option A: once

Option B: twice

Option C: four time

Option D: eight time

Correct Answer: twice ✔

Option A: change in its K.E always

Option B: change in its P.E always

Option C: change in its K.E and change in its P.E

Option D: neither change in K.E and nor change in its P.E

Correct Answer: change in its K.E and change in its P.E ✔

Option A: displacement

Option B: acceleration

Option C: power

Option D: energy

Correct Answer: power ✔

Option A: 1 hp = 546 watts

Option B: 1 hp = 746 watts

Option C: 1 hp = 1000 watts

Option D: 1 hp = 946 watts

Correct Answer: 1 hp = 746 watts ✔

Option A: frictional force

Option B: gravitational force

Option C: elastic force

Option D: centripetal force

Correct Answer: centripetal force ✔

Option A: electric field

Option B: conservative field

Option C: electromagnetic field

Option D: gravitational field

Correct Answer: conservative field ✔

Option A: 45°

Option B: 90°

Option C: 180°

Option D: 0°

Correct Answer: 0° ✔

Option A: 1.44kw/m2

Option B: 1.4kw/m2

Option C: 1 kw/m2

Option D: none

Correct Answer: 1 kw/m2 ✔

Option A: sun

Option B: earth

Option C: both A and B

Option D: moon

Correct Answer: moon ✔

Option A: power

Option B: work

Option C: impulse

Option D: torque

Correct Answer: power ✔

Option A: [ML2T-3]

Option B: [ML2T-2]

Option C: [ML2T3]

Option D: none of these

Correct Answer: [ML2T-3] ✔

Option A: positive

Option B: negative

Option C: zero

Option D: none of these

Correct Answer: negative ✔

Option A: heat energy to K.E

Option B: elastic P.E to K.E

Option C: elemical energy to elastic P.E

Option D: K.E to elastic P.E.

Correct Answer: elastic P.E to K.E ✔

Option A: 1600 ms-1

Option B: 50.6 ms-1

Option C: 71.6 ms-1

Option D: 2263ms-1

Correct Answer: 50.6 ms-1 ✔

Option A: 4.2 km S-1

Option B: 7.5 km S-1

Option C: 9.5 km S-1

Option D: 1.1 km S-1

Correct Answer: 1.1 km S-1 ✔

Option A: 120 J

Option B: 60 J

Option C: 30 J

Option D: 0.02 J

Correct Answer: 120 J ✔

Option A: friction

Option B: electric

Option C: gravitational

Option D: magnetic

Correct Answer: friction ✔

Option A: momentum increases 4 times and K.E increases 2 times

Option B: momentum and K.E. remain same

Option C: momentum increases 2 times and K.E increases constant

Option D: momentum increases 2 times and K.E increases 4 time

Correct Answer: momentum increases 2 times and K.E increases 4 time ✔

Option A: always positive

Option B: always negative

Option C: positive only for small frictional force

Option D: positive only for large frictional force

Correct Answer: always negative ✔

Option A: decay of radioactive element in the earth

Option B: compression of material in the earth

Option C: residual lost of the earth

Option D: all as said in A – B and C

Correct Answer: D. all as said in A – B and C ✔

Option A: its mass

Option B: the angle at which it is thrown

Option C: both its mass and the angle at which it is thrown

Option D: gravitational field of earth

Correct Answer: its mass ✔

Option A: force into small interval

Option B: displacement into small interval

Option C: both force and displacement into small intervals

Option D: force into small and displacement into large intervals

Correct Answer: displacement into small interval ✔

Option A: Proton

Option B: electron

Option C: neutron

Option D: a-particle

Correct Answer: electron ✔

Option A: any rate

Option B: at variable rate

Option C: at uniform rate

Option D: at high rate

Correct Answer: at uniform rate ✔

Option A: 38.2 J

Option B: 392.1 J

Option C: 39.2 J

Option D: 3.92 J

Correct Answer: 39.2 J ✔

Option A: zero

Option B: minimum

Option C: infinity

Option D: maximum

Correct Answer: maximum ✔