The magnetic field inside a long, straight, current-carrying solenoid is: MCQ with Answer and Explanation
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Question #1
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Refractive index n = c/v. For glass n=1.5, light speed is:
Correct Answer: Option C
Explanation:
v = c/n = 3×10⁸/1.5 = 2×10⁸ m/s. Direct refractive index formula application. Memory tip: 'Higher n ⇒ slower light; v = c/n'. Basic optics calculation frequently tested in competitive exams to verify formula recall and unit handling.
v = c/n = 3×10⁸/1.5 = 2×10⁸ m/s. Direct refractive index formula application. Memory tip: 'Higher n ⇒ slower light; v = c/n'. Basic optics calculation frequently tested in competitive exams to verify formula recall and unit handling.
Question #2
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The color of sky is blue due to
Question #3
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The SI unit of luminous flux is
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