2.
The figure shows variation of current (I) with time (t) in four devices P, Q, R and S. The device in which an alternating current flows is-

3.
Which of the following statements is correct?

5.
An ideal inductor is connected across an AC source of voltage. The current in the circuit-

6.
If the frequency of an ac source is made 4 times its initial value, then-

(A) Both X_{L} and X_{C} becomes 4 times

(B) Both X_{L} and X_{C} becomes 1/4 times

(C) X_{L} becomes 4 times and X_{C} becomes 1/4 times

(D) X_{L} becomes 1/4 times and X_{C} becomes 4 times

8.
Which of the following statements is true?

10.
The peak value of an alternating current is 14.14 A. If the frequency of the current is 50 Hz, the time taken by the current in reaching its maximum value from zero is-