Questions
For what value of R, current in the galvanometer is zero?
a
1 Ω
b
2 Ω
c
3 Ω
d
7 Ω
detailed solution
Correct option is A
Potential difference across resistance R equals 2 V with polarity as shown.Hence,current i=12−25=2 ASo, 2 x R = 2R=1 ΩHence, choice (1) is correct.Talk to our academic expert!
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A uniform wire of resistance 36 ohm is bent in the form of a circle as shown in fig The effective resistance across the points A and B is
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