The pressure at the bottom of a tank of water of depth 10 m (ρ=1000, g=10) is MCQ with Answer and Explanation

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The pressure at the bottom of a tank of water of depth 10 m (ρ=1000, g=10) is

A. 10 Pa

B. 1000 Pa

C. 100 Pa

D. 100000 Pa

Answer: Option D

Solution (By JKExamLibrary)

P = ρgh = 1000×10×10 = 100,000 Pa = 100 kPa.

This question belongs to: Science Physics

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Question #1 Report Error

A wire of resistance R is cut into three equal parts. These parts are then connected in parallel. The equivalent resistance is

A. R/9

B. 3R

C. R

D. R/3

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Correct Answer: Option A

Explanation:
Each part resistance = R/3. Three such in parallel: 1/R_eq = 3/(R/3) = 9/R => R_eq = R/9. For n equal parts cut and connected parallel, R_eq = R/n².

This question belongs to: Science Physics

Question #2 Report Error

The Q factor of a resonant LCR circuit is measure of

A. Selectivity

B. Impedance

C. Reactance

D. Power factor

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Correct Answer: Option A

Explanation:
Higher Q means sharper resonance, better selectivity.

This question belongs to: Science Physics

Question #3 Report Error

Which of the following is the correct sequence of increasing wavelength?

A. X-rays < Gamma < Radio < Infrared

B. Infrared < Radio < X-rays < Gamma

C. Radio < Infrared < X-rays < Gamma

D. Gamma rays < X-rays < Infrared < Radio

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Correct Answer: Option D

Explanation:
EM spectrum: Gamma (0.1 m). Increasing wavelength: Gamma, X-ray, IR, Radio.

This question belongs to: Science Physics

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