NEET Physics Current Electricity Questions Solved

In the adjoining circuit, the battery E1 has an e.m.f. of 12 volt and zero internal resistance while the battery E has an e.m.f. of 2 volt. If the galvanometer G reads zero, then the value of the resistance X in ohm is 

(1) 10

(2) 100

(3) 500

(4) 200

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