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Question (11)

QN005683

A solar lamp works for 8 hours after charging. How many hours will two such lamps work in total if used separately?

(A) 8 hours
(B) 12 hours
(C) 16 hours
(D) 24 hours

Correct Answer: C

Explanation:

8 + 8 = 16 hours.

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Question (12)

QN005684

Which activity depends indirectly on energy from the Sun?

(A) Photosynthesis in plants
(B) Formation of wind
(C) Water cycle
(D) All of these

Correct Answer: D

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Question (13)

QN005685

If a solar panel produces 30 units of electricity in 3 days, what is its average daily production?

(A) 5 units
(B) 10 units
(C) 15 units
(D) 30 units

Correct Answer: B

Explanation:

30 ÷ 3 = 10 units.

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Question (14)

QN005686

Which device converts solar energy into electrical energy?

(A) Solar panel
(B) Windmill
(C) Hand pump
(D) Battery cell

Correct Answer: A

Explanation:

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Question (15)

QN005687

A village installs 20 solar street lights. If each light saves 2 units of electricity daily, how many units are saved per day?

(A) 20
(B) 30
(C) 40
(D) 60

Correct Answer: C

Explanation:

20 × 2 = 40 units.

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Question (16)

QN005688

The heat of the Sun helps in:

(A) Evaporation of water
(B) Water cycle
(C) Drying clothes
(D) All of these

Correct Answer: D

Explanation:

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Question (17)

QN005689

A solar cooker is most effective on a:

(A) Cloudy day
(B) Rainy day
(C) Sunny day
(D) Windy night

Correct Answer: C

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Question (18)

QN005690

If a solar-powered calculator operates for 9 hours daily, how many hours will it operate in 6 days?

(A) 45 hours
(B) 54 hours
(C) 60 hours
(D) 63 hours

Correct Answer: B

Explanation:

9 × 6 = 54 hours.

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Question (19)

QN005691

Which of the following is a clean source of energy?

(A) Coal
(B) Diesel
(C) Solar energy
(D) Petroleum

Correct Answer: C

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Question (20)

QN005692

Why do plants depend on sunlight?

(A) For movement
(B) For photosynthesis
(C) For reproduction only
(D) For absorption of minerals only

Correct Answer: B

Explanation:

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Question (11)

A solar lamp works for 8 hours after charging. How many hours will two such lamps work in total if used separately?

Explanation:

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Question (12)

Which activity depends indirectly on energy from the Sun?

Explanation:

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Question (13)

If a solar panel produces 30 units of electricity in 3 days, what is its average daily production?

Explanation:

Link:

Question (14)

Which device converts solar energy into electrical energy?

Explanation:

Link:

Question (15)

A village installs 20 solar street lights. If each light saves 2 units of electricity daily, how many units are saved per day?

Explanation:

Link:

Question (16)

The heat of the Sun helps in:

Explanation:

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Question (17)

A solar cooker is most effective on a:

Explanation:

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Question (18)

If a solar-powered calculator operates for 9 hours daily, how many hours will it operate in 6 days?

Explanation:

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Question (19)

Which of the following is a clean source of energy?

Explanation:

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Question (20)

Why do plants depend on sunlight?

Explanation:

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