In a potentiometer circuit , the value of length AJ for which galvanometer shows null deflection is(Rac =4 ohm, AC= 100cm)
Answers
A simple potentiometer circuit is shown in figure the internal resistance of 4fV battery is negligible AC is the uniform wire of length 100 cm and resistance 2ohm .
The figure is attached.
Explanation:
The voltage across AB should be 1.5 V for the no deflection.
Hence, current through the wire Ac at balanced situation
I=4/(2.4+2)=0.91 A
let the length of AB be x
2x/100×0.91=1.5
x=150/1.82
=82.5 ohm
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✒️Your Question :-
➡️ In a potentiometer circuit , the value of length AJ for which galvanometer shows null deflection is(Rac =4 ohm, AC= 100cm)
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✒️Answer :-
I=4/(2.4+2)=0.91 A
let the length of AB be x
2x/100×0.91=1.5
x=150/1.82
=82.5 ohm
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➡️ hope this helps you ❗️❗️
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