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Conductivity and Resistivity

In the given ...

Question

In the given circuit the potential at point B is zero, the potential at points A and D will be.

V_{A} = 4 V; V_{D} = 9 V

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V_{A} = 3 V; V_{D} = 4 V

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V_{A} = 9 V; V_{D} = 3 V

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V_{A} = 4 V; V_{D} = 3 V

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Solution

The correct option is D $V_{A} = 4 V; V_{D} = 3 V$
Given,
$V_{B} = 0$
We know that the current flows through the resistor between $A$ and $B$ .
So, $V_{A} - 2 \times 2 = V_{B}$
$V_{A} - 4 = 0$
$V_{A} = 4 V$
A battery is connected between point $C$ and point $D$ . So, the potential of point $C$ and point $D$ is the same as that of the battery.
$V_{D} = 3 V$
The correct option is $D$ .

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In the given circuit the potential at point B is zero, the potential at points A and D will be.

The correct option is D VA=4V;VD=3VGiven,VB=0We know that the current flows through the resistor between A and B.So, VA−2×2=VBVA−4=0VA=4VA battery is connected between point C and point D. So, the potential of point C and point D is the same as that of the battery.VD=3VThe correct option is D.