An ammeter is always connected in MCQ with Answer and Explanation

Question Report Error

An ammeter is always connected in

A. Across supply

B. Either series or parallel

C. Series with circuit

D. Parallel with circuit

Answer: Option C

Solution (By JKExamLibrary)

Ammeter measures current, must be in series so full current flows through it. Low internal resistance to minimize voltage drop. Voltmeter measures potential difference, connected in parallel, high resistance.

This question belongs to: Science Physics

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A lactometer measures

A. Temperature of milk

B. Density of milk

C. Purity of milk

D. Viscosity of milk

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Correct Answer: Option C

Explanation:
Lactometer is a type of hydrometer used to check purity of milk by measuring specific gravity. Adulteration with water lowers density. It doesn't measure temperature or viscosity directly.

This question belongs to: Science Physics

Question #2 Report Error

If the momentum of a body is doubled, its kinetic energy becomes

A. Half

B. Double

C. Four times

D. Same

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Correct Answer: Option C

Explanation:
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Question #3 Report Error

A sound wave has time period 0.01 s. Its frequency is

A. 100 Hz

B. 0.1 Hz

C. 1000 Hz

D. 10 Hz

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Correct Answer: Option A

Explanation:
f = 1/T = 1/0.01 = 100 Hz.

This question belongs to: Science Physics

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