The frequency of a pendulum is 0.5 Hz. Its time period is MCQ with Answer and Explanation

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The frequency of a pendulum is 0.5 Hz. Its time period is

A. 5 s

B. 0.5 s

C. 2 s

D. 1 s

Answer: Option C

Solution (By JKSSB Mock Tests)

T = 1/f = 1/0.5 = 2 s.

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Question #1

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Superconductivity characterized by:

A. Infinite resistance

B. Zero permeability

C. Zero resistance below T_c

D. High conductivity only

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Correct Answer: Option C

Explanation:
Superconductors: zero electrical resistance below critical temperature T_c, plus Meissner effect (expel magnetic fields). Memory aid: 'Superconductor: R=0 below T_c; perfect diamagnetism'. Modern physics concept frequently tested in competitive exams.

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Question #2

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1 kWh of energy equals

A. 3.6 × 10³ J

B. 3.6 × 10⁶ J

C. 3.6 J

D. 3.6 × 10⁸ J

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Correct Answer: Option B

Explanation:
1 kWh = 1000 W × 3600 s = 3.6 × 10⁶ J. Important conversion.

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Question #3

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The phenomenon of diffraction is most pronounced when:

A. Obstacle size is much larger than wavelength

B. Obstacle size is much smaller than wavelength

C. Wavelength is zero

D. Obstacle size is comparable to wavelength

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Correct Answer: Option D

Explanation:
Diffraction (bending of waves around obstacles) is significant when obstacle or aperture size is comparable to the wavelength of the wave. If size >> λ, diffraction is negligible (ray optics); if size

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