Consider a long conductor, the middle of which is earthed. If the potential difference across the two ends of the conductor is $220 V$ , then what is the potential at the ends and the middle point?

220 V

all over the conductor

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110 V

and

- 110 V

at ends and

0 V

at the mid point

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0 V

at ends and

220 V

at midpoint

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- 220 V

all over the conductor

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Solution

The correct option is C $110 V$ and $- 110 V$ at ends and $0 V$ at the mid point
Let the potential at the ends be $V_{1} a n d V_{2}$ .
Since the middle point is earthed, its potential needs to be zero.
Also,
$V_{1} - V_{2} = 220$
$\Rightarrow V_{1} = 110 V a n d V_{2} = - 110 V$

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Consider a long conductor, the middle of which is earthed. If the potential difference across the two ends of the conductor is 220 V, then what is the potential at the ends and the middle point?

The correct option is C 110 V and −110 V at ends and 0 V at the mid pointLet the potential at the ends be V1andV2.Since the middle point is earthed, its potential needs to be zero. Also, V1−V2=220⇒V1=110 VandV2=−110 V

Consider a long conductor, the middle of which is earthed. If the potential difference across the two ends of the conductor is $220 V$ , then what is the potential at the ends and the middle point?

The correct option is C $110 V$ and $- 110 V$ at ends and $0 V$ at the mid point
Let the potential at the ends be $V_{1} a n d V_{2}$ .
Since the middle point is earthed, its potential needs to be zero.
Also,
$V_{1} - V_{2} = 220$
$\Rightarrow V_{1} = 110 V a n d V_{2} = - 110 V$