Figure shows the circuit of a potentiometer . The length of the potentiometerwire AB is 50 cm . Thee.m.f of the battery E_1 is 4 volt , having negligible internal resistance . Values of resistance R_1 and R_2 are 15 ohm and 5 ohm respectively . When both the keys are open, the null point is obtained at a distance of 31.25 cm from end A but when both the keys are closed , the balance length reduce to 5 cm only. Given R_(AB) = 10 Omega The e.m.f of the cell E_(2) is

Figure shows the circuit of a potentiometer . The length of the potent

1.	Figure shows the circuit of a potentiometer . The length of the potentiometerwire AB is 50 cm . Thee.m.f of the battery E_1 is 4 volt , having negligible internal resistance . Values of resistance R_1 and R_2 are 15 ohm and 5 ohm respectively . When both the keys are open, the null point is obtained at a distance of 31.25 cm from end A but when both the keys are closed , the balance length reduce to 5 cm only. Given R_(AB) = 10 Omega The e.m.f of the cell E_(2) is
Answer» 1 VOLT 2 volt 3 volt 4 volt Answer :A

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