Student Login

Home›Chapters›Moving Charges and Magnetism PYQs›Current Loop as a Magnetic Dipole›Question 43

MHT CET 2023 (13 May, Shift 2) · Current Loop as a Magnetic Dipole

Current Loop as a Magnetic Dipole question from MHT CET 2023 (13 May, Shift 2)

Q43MHT CET 2023 · 13 MAY · SHIFT 2Medium

Current Loop as a Magnetic Dipole

The ratio of magnetic field at the centre of the current carrying circular loop and magnetic moment is $X$ . When both the current and radius are doubled, then the ratio will be

Show answer and solution

Answer: (d)

$X = \frac{B}{M} = \frac{\mu_0 I/2R}{I\pi R^2} = \frac{\mu_0}{2\pi R^3}$ , independent of $I$ .
Doubling $R$ divides the ratio by $2^3 = 8$ .
So the answer is (d) $\frac{X}{8}$ .

Report a mistake

More questions on Current Loop as a Magnetic Dipole

A coil of ' n ' turns and radius ' R ' carries a current ' I '. It is unwound and rewound…MHT CET 2023 (12 May, Shift 2)
A solenoid of length 0.4 m and having 500 turns of wire carries a current 3 A. A thin…MHT CET 2023 (14 May, Shift 1)
A wire of length 8 m is bent to form a circular loop in y-z plane. A current of 0.5 A is…JEE Main 2022 (30 Jul, Shift 2)
Two concentric circular loops of radii r₁ = 30 cm and r₂ = 50 cm are placed in X - Y…JEE Main 2022 (26 Jul, Shift 2)
A wire of length 314 cm carrying current of 14 A is bent to form a circle. The magnetic…JEE Main 2022 (29 Jul, Shift 1)
A particle of charge 'q' and mass 'm' moves in a circular orbit of radius 'r' with…MHT CET 2021 (24 Sep, Shift 2)
An electron in a circular orbit of radius 0.05 nm performs 10¹⁶ revolutions/second. What…MHT CET 2021 (23 Sep, Shift 2)
Magnetic moment of revolving electron of charge (e) and mass (m) in terms of angular…MHT CET 2021 (21 Sep, Shift 2)