Analyse the following current-time graphs from two different sources:
(a) Identify the type of current in two cases
(b) What is the frequency of current in case II in India?
Use above graph to write one difference between the current m two cases.

You are given following current-time graph from two different sources, (i) Name the type of current in two cases. (ii) Identify any one source for each type of these currents. (iii) What is the frequency of current in case source II in India? (iv) Use above graph to write two differences between the currents in the two cases.

Name two electric devices for each where (i) heating effect of current is used and (ii) magnetic effect of current is used.

Identify the direction of induced current as seen from the above in the following cases. (a)

(a) What is the difference between alternating current and direct current ? (b) What type of current is given by (i) a dry cell, and (ii) a Power House generator ?

The phase difference between the voltage and the current in an AC circuit is pi//4 . If the frequency is 50Hz then this phase difference will be equivalent to a time of

Two narrow slits are illuminated by a single monochromatic source. Name the pattern obtained on the screen. One of the slits is now completely covered. What is the name of the pattern obtained now on the screen ? Draw intensity pattern obtanied in the two cases. Also, write two difference between the pattern obtained in the above two cases.