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In the circuit, the galvanometer G shows zero deflection. If the batteries A and B have negligible internal resistance, then the value of R is

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Important Questions on Current Electricity

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AMU-AT (B.Tech.)
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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 20 - Current Electricity>AMU-AT (B.Tech.) 2017>Q 9
Two identical cells are first connected in series and then in parallel. The ratio of power consumed by them is
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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 20 - Current Electricity>AMU-AT (B.Tech.) 2017>Q 10

A circuit is shown in the figure. The e.m.f. of the battery is

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 20 - Current Electricity>AMU-AT (B.Tech.) 2017>Q 11

The value of current i in the given figure is: 

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 20 - Current Electricity>AMU-AT (B.Tech.) 2017>Q 12
On stretching a wire its length is increased by 0.2%, its resistance will