Question

Figure shows a circuit with known resistances R1 and R2

Neglect the internal resistance of the
sources of current and resistance of the connecting wire. The magnitude of electromotive force E,
such that the current through the resistance R is zero will be:
(A) 1/2

(B) 2/1

(C) (1 +2)/2

(D) 1/(1 +2)​

Answer 1

Answer:

Figure shows a circuit with known resistances R1 and R2

Neglect the internal resistance of the

sources of current and resistance of the connecting wire. The magnitude of electromotive force E,

such that the current through the resistance R is zero will be:

(A) 1/2

(B) 2/1

(C) (1 +2)/2

(D) 1/(1 +2)