Question
Distinguish between 'alternating current' and 'direct current'.
| Alternating current | Direct current | |
| i. | Alternating current varies in magnitude continuously. ie., oscillatory. | Magnitude of direct current from a source remains same. i.e., non-oscillatory. |
| ii. | Direction reverses periodically, i.e., after equal intervals of time. | Direction remains same. |
| iii. | This type of current is used in electrical household appliances such as electric heater, refrigerator, electric iron, etc. | This type of current is not used much for household purposes but used in batteries, torches etc. |
| iv. | Frequency of A.C. in India is 50 Hz , i.e., its cycle changes in $\frac{1}{50}$ second. | Frequency of D.C. is zero. |
| v. | Produced by A.C. generator. | Produced by D.C. generator. |
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