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Question No. 2
When the switch is open in lowermost loop (secondary circuit) of a potentiometer the balance point length is 60 cm. When the switch is closed with a known resistance of
R = 4 ohm, the balance point length decreases to 40 cm. Find the internal resistance of the unknown battery?
O
402
Ο 2 Ω
Ο 3 Ω
O
6 Ω​

Answer 1

Answer:

The answer is 2

Explanation:

Mrk be as braliniest