The characteristic of sound that distinguishes between two sounds of same pitch and loudness is MCQ with Answer and Explanation

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The characteristic of sound that distinguishes between two sounds of same pitch and loudness is

A. Quality

B. Intensity

C. Frequency

D. Wavelength

Answer: Option A

Solution (By JKExamLibrary)

Timbre or quality depends on waveform/harmonics. Different instruments same note sound different.

This question belongs to: Science Physics

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Question #1 Report Error

An object is placed at 2F of a convex lens. Image formed is

A. Real, inverted, same size

B. Virtual, erect, magnified

C. Real, inverted, diminished

D. Virtual, inverted, same size

View Answer & Solution Discuss

Correct Answer: Option A

Explanation:
At 2F, image also at 2F, real inverted same size. Used in photocopiers.

This question belongs to: Science Physics

Question #2 Report Error

A wire of resistance 5 Ω is bent into a circle. The effective resistance between ends of a diameter is

A. 5 Ω

B. 2.5 Ω

C. 10 Ω

D. 1.25 Ω

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Correct Answer: Option D

Explanation:
Circle total resistance 5 Ω. Across diameter, two halves in parallel, each half 2.5 Ω. Parallel: R = (2.5×2.5)/(2.5+2.5) = 6.25/5 = 1.25 Ω. Equal parallel resistors gives half of each.

This question belongs to: Science Physics

Question #3 Report Error

A transformer with 100 primary turns and 500 secondary turns is a

A. Isolation transformer

B. Step-down transformer

C. Step-up transformer

D. Auto transformer

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Correct Answer: Option C

Explanation:
Ns > Np => step-up. Vs > Vp.

This question belongs to: Science Physics

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