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MHT CET202019 Oct 2020Morning ShiftPhysicsAlternating CurrentActual

An alternating current of frequency 50 ~Hz has the peak value as 14 14 ~A . The time taken by the alternating current in reaching from zero to maximum value and r.m.s. value of current will be respectively

Options

  1. A0.025 ~s , 5 ~A
  2. B0 005 ~s , 5 ~A
  3. C0 005 ~s , 10 ~A
  4. D0 025 ~s , 10 ~A

Correct answer

C. 0 005 ~s , 10 ~A

Step-by-step solution

(D) f =50 ~Hz , ~T = 1 50 ~s =0.02 ~s Time taken to reach from zero to maximum value is array l t= T 4 = 0.02 4 =0.005 ~s I_ m s = I₀ 2 = 14.14 1.414 =10 ~A array

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