Student Login

Home›Chapters›Moving Charges and Magnetism PYQs›Biot-Savart Law & Circular Coils›Question 101

NEET 2010 (AIPMT, Prelims) · Biot-Savart Law & Circular Coils

Biot-Savart Law & Circular Coils question from NEET 2010 (AIPMT, Prelims)

Q101NEET 2010 · AIPMT · PRELIMSMedium

Biot-Savart Law & Circular Coils

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 induction at the center of the ring is

Show answer and solution

Answer: (b)

Charge $q$ passes any point $f$ times per second, so $I = qf$ .
$B = \frac{\mu_0 I}{2R} = \frac{\mu_0 q f}{2R}$
So the answer is (b) $\frac{\mu_0 q f}{2R}$ .

Report a mistake

More questions on Biot-Savart Law & Circular Coils

A current loop consists of two identical semicircular parts each of radius R, one lying…NEET 2010 (AIPMT, Mains)
A current loop ABCD is held fixed on the plane of the paper as shown in the figure. The…JEE Main 2009 (AIEEE)
Two circular coils 1 and 2 are made from the same wire but the radius of the 1st coil is…NEET 2006 (AIPMT)
Two concentric coils each of radius equal to 2π cm are placed at right angles to each…JEE Main 2005 (AIEEE)
An electron moves in a circular orbit with a uniform speed v. It produces a magnetic…NEET 2005 (AIPMT)
A long wire carries a steady current. It is bent into a circle of one turn and the…JEE Main 2004 (AIEEE)
The magnetic field due to a current carrying circular loop of radius 3 cm at a point on…JEE Main 2004 (AIEEE)
The magnetic field of given length of wire for single turn coil at its centre is B then…NEET 2002 (AIPMT)