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Standard XII

Physics

Mixed Combination of Cells

In the follow...

Question

In the following circuit, the battery $E_{1}$ has an emf of $12 V$ and zero internal resistance while the battery $E$ has emf of $2$ volt. If the galvanometer $G$ reads zero, then the value of the resistance $X$ in ohm is

10

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100

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500

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200

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Solution

The correct option is B $100$
$I_{1} = \frac{12}{500 + x}$

$I_{2} = \frac{2}{x}$

As the galvanometer has zero deflection we have

$\frac{12}{500 + x} = \frac{2}{x}$ or $x = 100 o h m s$

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In the following circuit, the battery E1 has an emf of 12V and zero internal resistance while the batteryE has emf of 2 volt. If the galvanometer G reads zero, then the value of the resistance X in ohm is

The correct option is B 100I1=12500+xI2=2xAs the galvanometer has zero deflection we have12500+x=2x or x=100ohms

In the following circuit, the battery $E_{1}$ has an emf of $12 V$ and zero internal resistance while the battery $E$ has emf of $2$ volt. If the galvanometer $G$ reads zero, then the value of the resistance $X$ in ohm is

The correct option is B $100$
$I_{1} = \frac{12}{500 + x}$

$I_{2} = \frac{2}{x}$

As the galvanometer has zero deflection we have

$\frac{12}{500 + x} = \frac{2}{x}$ or $x = 100 o h m s$