1Hi karan..
well this question is not very clear.
1) Which is R the external resistance to? (the battery or galvanometer?
2) There is one data missing. Or there is some thing unclear with the language of the statement. :)
good luck
a battery with external resistance R with galvanometer in series are connected to form a circuit Across the galvanometer another external resistance 40ohm is connected in parallel through an open key K if key K is pressed then galvanometer reading becomes half the resistance of galvanometer is a)20ohm b)30ohm c)40ohm 50ohm
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3 Answers
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1hmm.. same here..
cant figure out is this is a complete question!!!