The temperature of a body is 122°F. In Celsius it is MCQ with Answer and Explanation

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The temperature of a body is 122°F. In Celsius it is

A. 90°C

B. 122°C

C. 30°C

D. 50°C

Answer: Option D

Solution (By JKSSB Mock Tests)

C = (122-32)×5/9 = 90×5/9 = 50°C.

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Practice More Physics Questions

Question #1

The boiling point of water on Kelvin scale is

A. 273.15 K

B. 100 K

C. 0 K

D. 373.15 K

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Correct Answer: Option D

Explanation:
Boiling point of water = 100°C = 100 + 273.15 = 373.15 K. Melting point of ice 0°C = 273.15 K. Kelvin is SI unit, no degree symbol.

This question belongs to: Science Physics

Question #2

Which of the following is a good conductor of electricity?

A. Glass

B. Wood

C. Rubber

D. Copper

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Correct Answer: Option D

Explanation:
Copper has free electrons, very low resistivity, excellent conductor. Glass, rubber, wood are insulators. Silver best conductor, but copper widely used. Graphite conducts but non-metal.

This question belongs to: Science Physics

Question #3

Half-life 5 days. Fraction remaining after 15 days:

A. 1/3

B. 1/2

C. 1/8

D. 1/16

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Correct Answer: Option C

Explanation:
Number of half-lives n = 15/5 = 3. Fraction = (1/2)³ = 1/8. Exponential decay: N = N₀(1/2)^(t/T). Memory aid: 'After n half-lives: fraction = 1/2ⁿ'. Radioactivity calculation frequently tested in competitive exams with simple half-life arithmetic.

This question belongs to: Science Physics

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