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MHT CET202015 Oct 2020Evening ShiftPhysicsAlternating CurrentActual

An alternating e.m.f. is given by e =e₀ sin wt. In what time the e.m.f. will have half its maximum value, if 'e' starts from zero? (T = Time period) ( 30^ = 60^ =0 5, 30^ = 60^ = 3 2 )

Options

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

Correct answer

A. T 12

Step-by-step solution

( E₀ 2 =E₀ ( 2 t T ) 1 2 = ( ) 6 = (2 t) T ) ( 2 t T = 6 T= T 12 )

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