Physics · 2020
NEET 2020 · 14 October · Code Z6 · Q125
A wire of length L metre carrying a current of I ampere is bent in the form of a circle. Its magnetic moment is,
A wire of length $\displaystyle L$ metre carrying a current of $\displaystyle I$ ampere is bent in the form of a circle. Its magnetic moment is,
Official answer
(3)
$\displaystyle I L^2 / 4 \pi \mathrm{Am}^2$
More from Moving Charges and Magnetism
- Ionized hydrogen atoms and α -particles with same momenta enters perpendicular to a constant magnetic field, B. The ratio of their radii of their…2019
- The figure given below shows a long straight solid wire of circular cross-section of radius 'a' carrying steady current I. The current I is uniformly…2026
- A long solenoid of radius 1 mm has 100 turns per mm. If 1 A current flows in the solenoid, the magnetic field strength at the centre of the solenoid…2022
- Charge q is uniformly spread on a thin ring of radius R. The ring rotates about its axis with a uniform frequency f Hz. The magnitude of magnetic…2011
- A galvanometer having a coil resistance of 60 Ω shows full scale deflection when a current of 1.0 amp passes through it. It can be converted into an…2009
- Two identical long conducting wires AOB and COD are placed at right angle to each other, with one above other such that 'O' is their common point for…2014
- A long solenoid of 50 cm length having 100 turns carries a current of 2.5 A. The magnetic field at the centre of the solenoid is: (μ_0=4 π × 10^-7 T…2020
- A circuit contains an ammeter, a battery of 30 V and a resistance 40.8 ohm all connected in series. If the ammeter has a coil of resistance 480 ohm…2015
NEET (UG) 2020 Physics question, with the answer from NTA’s final answer key. Where our answers come from.