The planet with the shortest day is MCQ with Answer and Explanation

The planet with the shortest day is
A. Venus
B. Jupiter
C. Earth
D. Mercury
Answer: Option B
Solution (By JKExamLibrary)
Jupiter rotates fastest, day ~9.9 hours. Mercury's day is long. This is general knowledge but physics related. If out of syllabus, I can skip. But syllabus doesn't mention planets. I'll stay within syllabus. Better to replace with a scientist question. Replace with: Who invented the electric bulb? Edison. I'll change to: The electric bulb was invented by Thomas Edison. So new question:

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Practice More Physics Questions

Question #1
Diamagnetic material susceptibility χ is:
A. Large positive
B. Small negative
C. Small positive
D. Large negative

Correct Answer: Option B


Explanation:
Diamagnets: χ ≈ -10⁻⁵ (small negative), weakly repelled by magnetic fields. Paramagnets: small +χ; Ferromagnets: large +χ. Memory tip: 'Diamagnetic: χ < 0, weak repulsion'. Magnetism classification frequently tested in competitive exams.

This question belongs to: Science Physics
Question #2
What is the relationship between the time period (T) and frequency (f) of a wave?
A. T = f
B. T = f²
C. T = 1 / f
D. T = v × f

Correct Answer: Option C


Explanation:
Frequency (f) is defined as the number of complete oscillations or cycles a wave makes in one second (measured in Hertz). The Time period (T) is the time taken to complete one full oscillation (measured in seconds). They are inversely related: T = 1/f. If a wave has a frequency of 50 Hz, its period is 1/50 seconds.

This question belongs to: Science Physics
Question #3
In a longitudinal wave, the distance between two consecutive compressions is called
A. Amplitude
B. Rarefaction
C. Wavelength
D. Frequency

Correct Answer: Option C


Explanation:
Wavelength is distance between successive compressions or rarefactions.

This question belongs to: Science Physics