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Shane Macguire Grade: upto college level
`        An electric bulb, when connected across a power supply of 220 V, consumes a power of 60 W. If the supply drops to 180 V, what will be the power consumed? If the supply is suddenly increased to 240 V, what will be the power consumed?`
3 years ago

Deepak Patra
474 Points
```										Sol. E = 2220 v P = 60 w
R = V^2/P = 220 * 220/60 = 220 * 11/3 Ω
(a) E = 180 v P = V^2/R = 180 * 180 * 3/220 *11 = 40.16 = 40 w
(b) E = 240 v P = V^2/R = 240 *240 *3/220 *11 = 71.4 = 71 w

```
3 years ago
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