Question

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 ____________.

विकल्प

• 0.025 s, 5A

• 0.005 s, 5A

• 0.025 s, 10A

• 0.005 s, 10A

Answer 1

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 0.005 s, 10A.

Explanation:

`"f" = 50  "Hz, T" = 1/50 "s" = 0.02  "s"`

Time taken to reach from zero to maximum value is

`"t" = "T"/4 = 0.02/4 = 0.005  "s"`

`"I"_"rms" = "I"_0/sqrt2 = 14.14/1.414 = 10  "A"`