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Question (31)

QN005703

A community center saves ₹50 per day by using solar lights. How much money is saved in 30 days?

(A) ₹1200
(B) ₹1300
(C) ₹1500
(D) ₹1800

Correct Answer: C

Explanation:

₹50 × 30 = ₹1500.

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Question (32)

QN005704

Solar energy is called an inexhaustible resource because it:

(A) Is found underground
(B) Gets replenished continuously
(C) Is available only during daytime
(D) Requires fuel for production

Correct Answer: B

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Question (33)

QN005705

A solar-powered fan runs for 4 hours daily. How many hours will it run in 12 days?

(A) 40 hours
(B) 44 hours
(C) 48 hours
(D) 52 hours

Correct Answer: C

Explanation:

4 × 12 = 48 hours.

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Question (34)

QN005706

Which of the following would decrease if there were no sunlight for many days?

(A) Photosynthesis
(B) Plant growth
(C) Food production in plants
(D) All of these

Correct Answer: D

Explanation:

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Question (35)

QN005707

A solar cooker prepares 3 meals in 3 days. What is the average number of meals prepared per day?

(A) 0.5
(B) 1
(C) 1.5
(D) 3

Correct Answer: B

Explanation:

3 ÷ 3 = 1 meal per day.

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Question (36)

QN005708

Which factor is most important for maximum efficiency of a solar panel?

(A) Availability of sunlight
(B) Presence of soil
(C) Wind speed only
(D) Underground water

Correct Answer: A

Explanation:

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Question (37)

QN005709

A housing colony installs 50 solar lights. If each saves 3 units of electricity daily, how many units are saved each day?

(A) 100
(B) 120
(C) 150
(D) 180

Correct Answer: C

Explanation:

50 × 3 = 150 units.

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Question (38)

QN005710

Which observation best shows the use of solar energy in everyday life?

(A) Charging a solar calculator outdoors
(B) Using a petrol generator
(C) Burning coal in a furnace
(D) Using a battery torch only

Correct Answer: A

Explanation:

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Question (39)

QN005711

A solar water heater supplies 150 litres of hot water daily. How much hot water will it supply in 8 days?

(A) 1000 litres
(B) 1100 litres
(C) 1200 litres
(D) 1300 litres

Correct Answer: C

Explanation:

150 × 8 = 1200 litres.

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Question (40)

QN005712

Why is energy from the Sun important for society?

(A) It supports life processes and provides a clean energy source
(B) It increases pollution levels
(C) It is available only in cities
(D) It replaces all other resources completely

Correct Answer: A

Explanation:

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Question (31)

A community center saves ₹50 per day by using solar lights. How much money is saved in 30 days?

Explanation:

Link:

Question (32)

Solar energy is called an inexhaustible resource because it:

Explanation:

Link:

Question (33)

A solar-powered fan runs for 4 hours daily. How many hours will it run in 12 days?

Explanation:

Link:

Question (34)

Which of the following would decrease if there were no sunlight for many days?

Explanation:

Link:

Question (35)

A solar cooker prepares 3 meals in 3 days. What is the average number of meals prepared per day?

Explanation:

Link:

Question (36)

Which factor is most important for maximum efficiency of a solar panel?

Explanation:

Link:

Question (37)

A housing colony installs 50 solar lights. If each saves 3 units of electricity daily, how many units are saved each day?

Explanation:

Link:

Question (38)

Which observation best shows the use of solar energy in everyday life?

Explanation:

Link:

Question (39)

A solar water heater supplies 150 litres of hot water daily. How much hot water will it supply in 8 days?

Explanation:

Link:

Question (40)

Why is energy from the Sun important for society?

Explanation:

Link:

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