Potentiometer: The resistive wire AB in the circuit shown has the length of 80cm. When switch S is open, the Galvanometer reads zero for L = L, = 0.4m. when switch S is closed, the Galvanometer reads zero for L = L2 = 0.2m. Therefore, the internal resistance (7) of the battery is: 4V A B E 1 4 1 L, r 1 *. R 12 Ω Select one:

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Potentiometer:
The resistive wire AB in the circuit shown has the length of 80cm.
When switch S is open, the Galvanometer reads zero for L = L1 =
0.4m. when switch S is closed, the Galvanometer reads zero for
L = L2 = 0.2m. Therefore, the internal resistance (7) of the battery is:
4V
A
B
E
1
*.
1
R
R r
12 Ω
Select one:
O a. 12 2
b. 62
O c. 42
O d. 3 2
Transcribed Image Text:1_4 Potentiometer: The resistive wire AB in the circuit shown has the length of 80cm. When switch S is open, the Galvanometer reads zero for L = L1 = 0.4m. when switch S is closed, the Galvanometer reads zero for L = L2 = 0.2m. Therefore, the internal resistance (7) of the battery is: 4V A B E 1 *. 1 R R r 12 Ω Select one: O a. 12 2 b. 62 O c. 42 O d. 3 2
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