MCQ
The current sensitibility of a moving coil galanometer increases with decrease in:
- AMagnetic field
- BArea of a coil
- CNumber of turns
- DNone of these
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Water boils in an electric kettle in 15 minutes after switching on. If the length of the heating wire is decreased to 2/3 of its initial value, then the same amount of water will boil with the same supply voltage in
|
(a) 15 minutes |
(b) 12 minutes |
(c) 10 minutes |
(d) 8 minutes |