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Question (11)

QN006292

A moving cricket ball possesses:

(A) Potential energy only
(B) Kinetic energy
(C) Chemical energy
(D) Electrical energy

Correct Answer: B

Explanation:

Moving objects possess kinetic energy

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Question (12)

QN006293

Which device converts electrical energy into mechanical energy?

(A) Electric bulb
(B) Motor
(C) Solar cell
(D) Heater

Correct Answer: B

Explanation:

Electric motor converts electrical energy into motion

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Question (13)

QN006294

Which energy transformation occurs in a burning candle?

(A) Electrical → Mechanical
(B) Heat → Chemical
(C) Chemical → Heat and Light
(D) Mechanical → Electrical

Correct Answer: C

Explanation:

Wax stores chemical energy

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Question (14)

QN006295

A 5 kg object at height 8 m has potential energy equal to:

(A) 40 J
(B) 80 J
(C) 200 J
(D) 400 J

Correct Answer: D

Explanation:

PE = 5 × 10 × 8 = 400 J

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Question (15)

QN006296

Which form of energy is associated with flowing water in dams?

(A) Magnetic energy
(B) Mechanical energy
(C) Sound energy
(D) Nuclear energy

Correct Answer: B

Explanation:

Flowing water possesses mechanical energy

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Question (16)

QN006297

Exact definition: “Energy is the capacity to”

(A) Increase mass
(B) Do work
(C) Produce force
(D) Increase speed

Correct Answer: B

Explanation:

Energy is the capacity to do work

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Question (17)

QN006298

A body moving at 6 m/s has kinetic energy 54 J. Its mass is:

(A) 1 kg
(B) 2 kg
(C) 3 kg
(D) 4 kg

Correct Answer: C

Explanation:

54 = ½ × m × 36, so m = 3 kg

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Question (18)

QN006299

Which energy conversion takes place in a microphone?

(A) Electrical → Sound
(B) Sound → Electrical
(C) Heat → Mechanical
(D) Chemical → Sound

Correct Answer: B

Explanation:

Microphone converts sound into electrical energy

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Question (19)

QN006300

A stretched bow possesses:

(A) Kinetic energy
(B) Heat energy
(C) Potential energy
(D) Sound energy

Correct Answer: C

Explanation:

Stretched objects possess elastic potential energy

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Question (20)

QN006301

If the velocity of a body doubles, its kinetic energy becomes:

(A) Half
(B) Double
(C) Four times
(D) Eight times

Correct Answer: C

Explanation:

KE ∝ v²

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Question (11)

A moving cricket ball possesses:

Explanation:

Link:

Question (12)

Which device converts electrical energy into mechanical energy?

Explanation:

Link:

Question (13)

Which energy transformation occurs in a burning candle?

Explanation:

Link:

Question (14)

A 5 kg object at height 8 m has potential energy equal to:

Explanation:

Link:

Question (15)

Which form of energy is associated with flowing water in dams?

Explanation:

Link:

Question (16)

Exact definition: “Energy is the capacity to”

Explanation:

Link:

Question (17)

A body moving at 6 m/s has kinetic energy 54 J. Its mass is:

Explanation:

Link:

Question (18)

Which energy conversion takes place in a microphone?

Explanation:

Link:

Question (19)

A stretched bow possesses:

Explanation:

Link:

Question (20)

If the velocity of a body doubles, its kinetic energy becomes:

Explanation:

Link:

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