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A potentiometer circuit is setup as show...

A potentiometer circuit is setup as shown. The potential gradient across the potentiometer wire is `k "volt"//cm` and the ammeter present in the circuit reads. `1.0 A` When two-way key is switched off. The balance point, when the key between the terminals (i) 1 and 2 (ii) 1 and 3, is plugged in, are found to be at lengths `l_(2) cm` and `l_(2) cm` respectively. The magnitudes, of the resistors `R` and `X`, in ohm, are then, equal, respectively, to

A

`k(l_(2)-l_(1))"and"kl_(2)`

B

`kl_(1)"and"k(l_(2)-l_(1))`

C

`k(l_(2)-l_(1))"and"kl_(2)`

D

`kl_(1)"and"kl_(2)`

Text Solution

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The correct Answer is:
B
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