Back to Current Electricity In the given circuit of potentiometer, the potential difference E across AB (10 m length) is larger than E
1
and E
2
as well. For key K
1
(closed), the jockey is adjusted to touch the wire at point J
1
so that there is no deflection in the galvanometer. Now the first battery (E
1
) is replaced by second battery (E
2
) for working by making K
1
open and K
2
closed. The galvanometer gives then null deflection at J
2
. The value of {{{E_1}} \over {{E_2}}} is {a \over b}, where a = _________.
Class 12 • Physics • Chapter-3
Current Electricity
Question 171 of 735
171EasyInteger TypeJEE Mains2021
In the given circuit of potentiometer, the potential difference E across AB (10 m length) is larger than E
1
and E
2
as well. For key K
1
(closed), the jockey is adjusted to touch the wire at point J
1
so that there is no deflection in the galvanometer. Now the first battery (E
1
) is replaced by second battery (E
2
) for working by making K
1
open and K
2
closed. The galvanometer gives then null deflection at J
2
. The value of {{{E_1}} \over {{E_2}}} is {a \over b}, where a = _________.
Integer / Numeric Answer Type
Enter your answer as a number (integer or decimal).