1.

In the following circuit a 10 m long potentiometer wire with resistance 1.2 ohm/m, a resistance R1 and an accumulator of emf 2 V are connected in series. When the emf of thermocouple is 2.4 mV then the deflection in galvanometer is zero. The current supplied by the accumulator will be

A.            4 ´ 10?4 A
B.            8 ´ 10?4 A
C.            4 ´ 10?3 A
D.            8 ´ 10?3 A
Answer» B.            8 ´ 10?4 A


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