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In the following circuit fig, a 10m long...

In the following circuit fig, a 10m long potentiometer wire with resistance 1,2 ohm/m, a resistance `R_1` and an accumulator of e.m.f. 2V are connected in series. When the e.m.f. of thermocouple is 2.4 mV the deflection in galvanometer is zero. The current supplied by the accumulator will be

A

`4xx10^(-4)A`

B

`8xx10^(-4)A`

C

`4xx10^(-3)A`

D

`8xx10^(-3)A`

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