The principle of a pressure cooker is MCQ with Answer and Explanation

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The principle of a pressure cooker is

A. Increase in pressure raises boiling point

B. No effect on boiling point

C. Decrease in pressure raises boiling point

D. Increase in pressure lowers boiling point

Answer: Option A

Solution (By JKSSB Mock Tests)

Higher pressure inside, boiling point >100°C, food cooks faster.

This question belongs to: Science Physics

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Practice More Physics Questions

Question #1

The work done by a centripetal force in half revolution is

A. πrF

B. mv²

C. 2F r

D. Zero

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Correct Answer: Option D

Explanation:
Centripetal force always perpendicular to displacement, work zero.

This question belongs to: Science Physics

Question #2

The part of human eye that controls amount of light entering is

A. Retina

B. Lens

C. Iris

D. Cornea

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Correct Answer: Option C

Explanation:
Iris adjusts pupil size. In bright light pupil constricts, dim light dilates. Retina forms image. Cornea and lens focus. Eye is like camera.

This question belongs to: Science Physics

Question #3

The substance that sublimes is

A. Ice

B. Naphthalene

C. Iron

D. Water

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Correct Answer: Option B

Explanation:
Naphthalene (mothballs), camphor, dry ice sublime (solid → gas). Ice melts. Iron solid till melting. Water evaporates from liquid. Sublimation skips liquid phase.

This question belongs to: Science Physics

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