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MHT CET202210 Aug 2022Morning ShiftPhysicsAlternating CurrentActual

An alternating e.m.f. is given as e=e₀ t . 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 )

Options

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

Correct answer

A. T 12

Step-by-step solution

Let t^ be the time when emf is half the maximum value aligned & e₀ 2 =e₀ ( t^ ) & 1 2 = ( t^ ) & t^ = ( 6 ) & ( 2 T ) t^ = 6 & t^ = T 12 aligned

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