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Eight cells marked 1 to 8, each of emf 5...

Eight cells marked 1 to 8, each of emf `5 V` and internal resistance `0.2 Omega` are connected as shown. What is the reading of ideal voltmeter ?

A

`40 V`

B

`20 V`

C

`5 V`

D

Zero

Text Solution

Verified by Experts

The correct Answer is:
D
(d) Current flowing in circuit
`i= (nE)/(nr) = (5)/(0.2) = 25 A`
Terminal potential difference across the terminals of battery numbered 8,
`V = E - ir = 5 - 25 xx 0.2 = 0`
`V = 0`
Hence, voltmeter reading is zero. So, choice (d) is correct
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Knowledge Check

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