Current Electricity and Electrical InstrumentHard

Question

In the circuit shown  in figure.

Options

A.Power supplied by the battery is 200W
B.current flowing in the circuit is 5 A
C.potential difference across the 4Ω resistance is equal to the potential difference across the 6Ω resistance
D.current in wire AB is zero

Solution

4Ω and 6Ω resistor are short - circuited, Therefore no current will flow through these resistances. Current passing through the battery is I = (20/2) = 10A. This is also the current passing in wire AB from B to A.
Power supplied by the battery P = EI = (20) (10) = 200 W
Potential difference across  the  resistance = potential difference across the  resistance

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