Transformer turns ratio N_p:N_s = 1:5. If V_p = 100V, V_s is: MCQ with Answer and Explanation

Transformer turns ratio N_p:N_s = 1:5. If V_p = 100V, V_s is:
A. 2500V
B. 500V
C. 20V
D. 100V
Answer: Option B
Solution (By JKSSB Mock Tests)
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.

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Sunlight travel time to Earth:
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B. 8 minutes
C. 8 days
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Correct Answer: Option B


Explanation:
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Correct Answer: Option A


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Newton's first law (law of inertia) states bodies remain at rest or uniform motion unless acted upon by external force. This defines inertia - resistance to change in motion state. Force is defined in second law; momentum conservation in third. Memory aid: 'First law = inertia; second = F=ma; third = action-reaction'. Fundamental concept frequently tested to assess basic mechanics understanding.

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