The internal resistance of the cell shown in the figure is negligible. On closing the key k , the ammeter reading changes from 0.25 A to 5 12 A , then what is the value of resistance R 1 (in ohm)?

Question

The internal resistance of the cell shown in the figure is negligible. On closing the key k , the ammeter reading changes from 0.25 A to 5 12 A , then what is the value of resistance R 1 (in ohm)?,

MARKS App · Accepted Answer

When k was open Reading of A = E 10 A = 0.25 , When k was closed Reading of A = E 10 + R 1 10 R 1 = 5 12 ⇒ 12 5 + 0.5 R 1 = 10 R 1 R 1 = 15 Ω

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