The audible range of sound for human beings is MCQ with Answer and Explanation
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Question #1
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The electromagnetic waves used in radar are
Question #2
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Transformer turns ratio N_p:N_s = 1:5. If V_p = 100V, V_s is:
Correct Answer: Option B
Explanation:
V_s/V_p = N_s/N_p ⇒ V_s = 100×(5/1) = 500V. Step-up transformer increases voltage. Memory aid: 'Turns ratio = voltage ratio; current ratio inverse'. Direct transformer formula application frequently tested in competitive exams with ratio calculations.
V_s/V_p = N_s/N_p ⇒ V_s = 100×(5/1) = 500V. Step-up transformer increases voltage. Memory aid: 'Turns ratio = voltage ratio; current ratio inverse'. Direct transformer formula application frequently tested in competitive exams with ratio calculations.
Question #3
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A force of 10 N acts on a body of mass 2 kg for 1 s. Change in momentum is
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