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

Eight cells marked 1 to 8, each of emf 5V and internal resistance `0.2Omega` 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
Current flowing in circuit,
`i=(nE)/(nr)=(5)/(0.2)=25A`
Terminal potential difference across the terminals of battery numbered 8,
`V=E-ir=5-25xx0.2=0`
`V=0`
Hence, voltmeter reading is zero. So, choice (D) is correct.
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