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First, a set of n equal resistors of 10 each are connected in

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First, a set of n equal resistors of $10Ω$ each are connected in series to a battery of emf $20 V$ and internal resistance $10Ω$ . A current $I$ is observed to flow. Then, the $n$ resistors are connected in parallel to the same battery. It is observed that the current is increased 20 times, then the value of n is

Name: Video solution 2: First, a set of n equal resistors of 10Ω each are connected in series to a battery of emf 20 V and internal resistance 10Ω. A current I is observed to flow. Then, the n resistors are connected in parallel to the same battery. It is observed that the current is increased 20 times, then the value of n is
Uploaded: 2023-11-12T02:43:54.000Z
Duration: 7 min
Description: Video solution 2: First, a set of n equal resistors of 10Ω each are connected in series to a battery of emf 20 V and internal resistance 10Ω. A current I is observed to flow. Then, the n resistors are connected in parallel to the same battery. It is observed that the current is increased 20 times, then the value of n is

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Updated on: Nov 12, 2023

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JEE Mains 2021 Aug 27 Shift 1

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First, a set of n equal resistors of

10Ω

each are connected in series to a battery of emf

20 V

and internal resistance

10Ω

. A current

I

is observed to flow. Then, the

n

resistors are connected in parallel to the same battery. It is observed that the current is increased 20 times, then the value of n is

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Text solutionVerified

i_{p} = 20 i_{s}

\frac{20}{( \frac{10}{n} + 10 )} = 20 (\frac{20}{10 n + 10}) \Rightarrow \frac{20 n}{10 + 10 n} = 20 (\frac{20}{10 n + 10}) n = 20

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7 mins

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Question Text	First, a set of n equal resistors of $10Ω$ each are connected in series to a battery of emf $20 V$ and internal resistance $10Ω$ . A current $I$ is observed to flow. Then, the $n$ resistors are connected in parallel to the same battery. It is observed that the current is increased 20 times, then the value of n is
Updated On	Nov 12, 2023
Topic	Current Electricity
Subject	Physics
Class	Class 12
Answer Type	Text solution:1 Video solution: 3
Upvotes	336
Avg. Video Duration	5 min

Text solutionVerified

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