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MHT CET202613 April 2026Morning ShiftPhysicsAlternating CurrentActual

An alternating e.m.f. is given by e = e₀ t . In what time the e.m.f. will have half its maximum value, if 'e' starts from zero? ( 30^ = 0.5 )

Options

  1. AT 4
  2. BT 8
  3. CT 12
  4. DT 16

Correct answer

C. T 12

Step-by-step solution

Given e = e₀ t The maximum value of e.m.f. is e₀ . The time t when the e.m.f. reaches half of its maximum value is given by e = e₀ 2 . Substituting e = e₀ 2 in the given equation: e₀ 2 = e₀ t t = 1 2 t = 6 Substituting = 2 T : 2 T t = 6 t = T 12 Answer: T 12

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