A cell of e.m.f E and internal resistance r is connected across a resistance r. The potential difference between the terminals of the cell must be
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12th
Physics
Current Electricity
EMF, Terminal Voltage and Internal Resistance and Problems on It
A cell of e.m.f E and inter...
PHYSICS
A cell of e.m.f E and internal resistance r is connected across a resistance r. The potential difference between the terminals of the cell must be
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Current in circuit=i=
r+r
E
=
2r
E
Potential difference across cell=V=E−ir=E−
2r
E
r
⟹V=
2
E
Answer-(B)
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