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Magnetic Effects & Magnetism

JEE Main level, single correct, medium

92 of 276

Question 92 of 276

A current $i$ is flowing in a straight conductor of length $L$ . The magnetic induction at a point on its axis at a distance $\frac{L}{4}$ from its centre will be :

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Answer: (A) Zero

Magnetic field at any point lies on axial position of current carrying conductor

\mathrm{B}=0

JEE Main question paper PDF

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JEE Main 2025 Apr 2 Shift 1 question paper

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More Physics practice

Magnetic Effects & MagnetismThe magnetic field at the centre of a circular coil of radius $R$ carrying current $I$ is $B_0$ . At an axial point at distance $x = R\sqrt{3}$ from the centre, the magnetic field is:
Magnetic Effects & MagnetismThe magnetic susceptibility of a diamagnetic substance is:
Magnetic Effects & MagnetismA coaxial cable consists of an inner solid wire of radius $a$ and an outer thin cylindrical shell of radius $b$ carrying equal and opposite steady current $I$ . The magnetic energy stored per unit length in the space between $a$ and $b$ is:
Magnetic Effects & MagnetismThe ratio of magnetic field at the centre of a current carrying coil of radius $r$ to the magnetic field at distance $r$ from the centre of coil on its axis is $\sqrt{x}:1$ . The value of $x$ is _____.
Magnetic Effects & MagnetismTwo identical circular wires of radius $20cm$ and carrying current $\sqrt{2}A$ are placed in perpendicular planes as shown in figure. The net magnetic field at the centre of the circular wires is $________\times {10}^{-8}T.$

(Take $\pi =3.14$ )
Magnetic Effects & MagnetismA rod with circular cross-section area $2{cm}^{2}$ and length $40cm$ is wound uniformly with $400$ turns of an insulated wire. If a current of $0.4A$ flows in the wire windings, the total magnetic flux produced inside windings is $4\pi \times {10}^{-6}Wb$ . The relative permeability of the rod is
(Given : Permeability of vacuum ${\mu }_{0}=4\pi \times {10}^{-7}N{A}^{-2}$ )

JEE Main Physics practice question on Magnetic Effects & Magnetism (Magnetic Field), with the answer and a step-by-step solution. Scan a question from your own book or paper to get a whiteboard video.

A current iii is flowing in a straight conductor of length LLL. The magnetic induction at a point on its axis at a distance L4\frac{L}{4}4L​ from its centre will be :

JEE Main question paper PDF

More Physics practice

A current $i$ is flowing in a straight conductor of length $L$ . The magnetic induction at a point on its axis at a distance $\frac{L}{4}$ from its centre will be :