The instrument to measure pressure difference is MCQ with Answer and Explanation

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The instrument to measure pressure difference is

A. Aneroid barometer

B. Manometer

C. Hydrometer

D. Barometer

Answer: Option B

Solution (By JKSSB Mock Tests)

Manometer measures pressure difference, often U-tube. Barometer measures atmospheric pressure.

This question belongs to: Science Physics

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Practice More Physics Questions

Question #1

Heat transfer by fluid motion is:

A. Convection

B. Radiation

C. Conduction

D. All three

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Correct Answer: Option A

Explanation:
Convection: bulk fluid motion carries heat (natural: density-driven; forced: pump/fan). Conduction: molecular collisions; radiation: EM waves. Memory aid: 'Convection = fluid flow + heat; e.g., boiling, weather'. Heat transfer mode frequently tested in competitive exams.

This question belongs to: Science Physics

Question #2

A wave completes 20 oscillations in 4 seconds. Frequency is

A. 4 Hz

B. 0.2 Hz

C. 5 Hz

D. 80 Hz

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Correct Answer: Option C

Explanation:
f = 20/4 = 5 Hz.

This question belongs to: Science Physics

Question #3

Which component in an electrical circuit is specifically designed to melt and break the circuit in the event of an overload?

A. Switch

B. Resistor

C. Capacitor

D. Fuse

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Correct Answer: Option D

Explanation:
A fuse is an electrical safety device consisting of a wire made of an alloy with a low melting point. If the current exceeds a safe limit (due to a short circuit or overload), the Joules heating (I²Rt) causes the wire to melt instantly, breaking the circuit and preventing fire or damage to appliances.

This question belongs to: Science Physics

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