Saved Bookmarks
| 1. |
Derive an expression for electric energy consumed in a device in terms of V, I and f, where V is the potential difference applied to it, I is the current drawn by it and f is the time for which the current flows ? CBSE Class X Science SA 2 (3 Marks) |
|
Answer» For any circuit element, the power is EQUAL to the voltage difference across the element multiplied by the current. By Ohm's Law, V = IR, and so there are additional forms of the electric power formula for resistors. Power is MEASURED in UNITS of Watts (W), where a WATT is equal to a Joule PER second (1 W = 1 J/s). |
|