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Question (31)

QN006312

Windmills convert wind energy into:

(A) Chemical energy
(B) Electrical energy
(C) Heat energy
(D) Nuclear energy

Correct Answer: B

Explanation:

Windmills generate electrical energy

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Question (32)

QN006313

The energy stored in fuels such as petrol and diesel is:

(A) Mechanical energy
(B) Chemical energy
(C) Nuclear energy
(D) Heat energy

Correct Answer: B

Explanation:

Fuels store chemical energy

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Question (33)

QN006314

A 7 kg object raised to height 2 m has potential energy equal to:

(A) 14 J
(B) 70 J
(C) 140 J
(D) 700 J

Correct Answer: C

Explanation:

PE = 7 × 10 × 2 = 140 J

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Question (34)

QN006315

Which form of energy is produced by vibrating objects?

(A) Heat energy
(B) Sound energy
(C) Light energy
(D) Chemical energy

Correct Answer: B

Explanation:

Vibrations produce sound energy

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Question (35)

QN006316

The Sun is the ultimate source of:

(A) Only sound energy
(B) Only magnetic energy
(C) Most forms of energy on Earth
(D) Only nuclear energy

Correct Answer: C

Explanation:

Most energy sources originate from the Sun

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Question (36)

QN006317

Which device converts solar energy directly into electrical energy?

(A) Electric motor
(B) Solar cell
(C) Generator
(D) Heater

Correct Answer: B

Explanation:

Solar cells convert sunlight into electricity

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Question (37)

QN006318

A moving truck has greater kinetic energy than a bicycle moving at same speed because the truck has:

(A) Greater height
(B) Greater mass
(C) Greater colour intensity
(D) Greater temperature

Correct Answer: B

Explanation:

KE depends on mass and velocity

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Question (38)

QN006319

A body possesses 98 J potential energy at height 5 m. Its mass is:

(A) 1 kg
(B) 2 kg
(C) 5 kg
(D) 10 kg

Correct Answer: B

Explanation:

m = 98 ÷ (9.8 × 5) = 2 kg

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Question (39)

QN006320

Which form of energy is involved in photosynthesis?

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

Correct Answer: B

Explanation:

Plants use sunlight during photosynthesis

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Question (40)

QN006321

A 2 kg stone thrown upward slows down because kinetic energy changes into:

(A) Heat energy
(B) Chemical energy
(C) Potential energy
(D) Electrical energy

Correct Answer: C

Explanation:

KE converts into PE during upward motion

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Question (31)

Windmills convert wind energy into:

Explanation:

Link:

Question (32)

The energy stored in fuels such as petrol and diesel is:

Explanation:

Link:

Question (33)

A 7 kg object raised to height 2 m has potential energy equal to:

Explanation:

Link:

Question (34)

Which form of energy is produced by vibrating objects?

Explanation:

Link:

Question (35)

The Sun is the ultimate source of:

Explanation:

Link:

Question (36)

Which device converts solar energy directly into electrical energy?

Explanation:

Link:

Question (37)

A moving truck has greater kinetic energy than a bicycle moving at same speed because the truck has:

Explanation:

Link:

Question (38)

A body possesses 98 J potential energy at height 5 m. Its mass is:

Explanation:

Link:

Question (39)

Which form of energy is involved in photosynthesis?

Explanation:

Link:

Question (40)

A 2 kg stone thrown upward slows down because kinetic energy changes into:

Explanation:

Link:

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