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Two cells when connected in series are b...

Two cells when connected in series are balanced on `8 m` on a potentiometer. If cells are connected with polarities of one the cellis reversed, they balance on `2 m`. The ratio of e.m.f.'s of the two cellsis

A

`3:5`

B

`5:3`

C

`3:4`

D

`4:3`

Text Solution

Verified by Experts

The correct Answer is:
B
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ERRORLESS -CURRENT ELECTRICITY-Self Evaluation Test -19
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  9. A voltmeter of resistance 1000 Omega is connected across a resistance ...

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  10. A beam contains 2 xx 10^(8) doubly charged positive ions per cubic cen...

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  11. In the circuit shown, the reading of ammeter when switch S is open ...

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  12. In the circuit as shown in figure the

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  16. A potential divider is used to give outputs of 4 V and 8 V from a 12 V...

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  17. Find equivalent resistance between A and B

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  18. Following figures show four situations in which positive and negative ...

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  19. A and B are two square plates of same metal and same thickness but len...

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  20. A moving coil galvanometer is converted into an ammeter reads upto 0.0...

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