- The potential difference applied across a given resistor is altered so that the heat produced per second increases by a factor of 9. By what factor does the applied potential difference change?
- In the figure shown, an ammeter A and a resistor of $4\Omega$ are connected to the terminals of the source. The emf of the source is 12 V having an internal resistance of $2\Omega$. Calculate the voltmeter and ammeter readings.
CBSE OUTSIDE DELHI - SET 3 2017
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- $H=\frac{V^2}{R}$
- Ammeter Reading $I=\frac{V}{R+r}$
Voltmeter Reading $V=E-Ir$
$=[12-(2\times2)]\text{ }\text{V}=8\text{V}$
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