Question

An alternating current is given by the expression 〖i=20 sin 100 t amperes. The time taken by

the current to achieve - 20 A second time measuring from t=0 is

a. 0.035 sec

b. 0.015 sec

c. 0.02 sec

d. 0.07 sec​

Answer 1

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The answer of u r question is..!!

Option.B

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Answer 2

Answer:

D

Explanation:

i=20sin100t A

20=20sin100t A

1=sin100t A

1=sin32πt A

sin(π/2)=sin31.83πt

1/2(31.83)=t

t=0.015A