A source of e.m.f. `E = 15V` and having negligible internal resistance is connected to a variable resistance so that the current in the circuit increa

A source of e.m.f. `E = 15V` and having negligible internal resistance is connected to a variable resistance so that the current in the circuit increa
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A source of e.m.f. `E = 15V` and having negligible internal resistance is connected to a variable resistance so that ... 10 C B. 20 C C. 30 C D. 40 C
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