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JEE Main 2003 (AIEEE) · Kirchhoff's Laws & Measuring Instruments

Kirchhoff's Laws & Measuring Instruments question from JEE Main 2003 (AIEEE)

Q202JEE Main 2003 · AIEEEMedium

Kirchhoff's Laws & Measuring Instruments

A $3$ volt battery with negligible internal resistance is connected in a circuit as shown in the figure. The current $I$ , in the circuit will be

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Answer: (b)

The battery is across two corners of the triangle: one $3\ \Omega$ side in parallel with the other two sides in series ( $6\ \Omega$ ).
$R = \frac{3 \times 6}{3 + 6} = 2\ \Omega$
$I = \frac{3}{2} = 1.5\text{ A}$
So the answer is (b) 1.5 A.

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