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The circuit in figure consists of wires at the top and bottom and identical springs as the left and right sides. The wire at the bottom has a mass of 10 ~g and is 5 ~cm long. The wire is hanging as shown in the figure. The springs stretch 0.5 ~cm under the weight of the wire and the circuit has a total resistance of 12 Ω. When the lower wire is subjected to a static magnetic field, the springs, stretch an additional 0.3 ~cm. The magnetic field is

0.6 ~T and directed out of page

1.2 ~T and directed into the plane of page

0.6 ~T and directed into the plane of page

1.2 ~T and directed out of page

Magnetic Effects & Magnetism

JEE Main level, single correct, medium

236 of 276

Question 236 of 276

The circuit in figure consists of wires at the top and bottom and identical springs as the left and right sides. The wire at the bottom has a mass of $10 \mathrm{~g}$ and is $5 \mathrm{~cm}$ long. The wire is hanging as shown in the figure. The springs stretch $0.5 \mathrm{~cm}$ under the weight of the wire and the circuit has a total resistance of $12 \Omega$ . When the lower wire is subjected to a static magnetic field, the springs, stretch an additional $0.3 \mathrm{~cm}$ . The magnetic field is

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Answer: (A) $0.6 \mathrm{~T}$ and directed out of page

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JEE Main question paper PDF

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JEE Main 2025 Apr 2 Shift 1 question paper

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