In the given circuit diagram, a wire is joining points B and D. The current in this wire is:

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In the given circuit diagram, a wire is joining points B and D. The current in this wire is:

PhysicsCurrent ElectricityJEE MainJEE Main 2020 (09 Jan Shift 1)

Options:

A $0.4 A$
B $2 A$
C $4 A$
D zero

Solution:

1137 Upvotes Verified Answer

The correct answer is:

2 A

R_{e f f} = \frac{4}{5} + \frac{6}{5} = 2 Ω

i = \frac{20}{2}

= 10 A

I = \frac{4 i}{5} - \frac{3 i}{5} = + \frac{i}{5} = 2 A

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