Student Login

Home›Chapters›Moving Charges and Magnetism PYQs›Ampere's Law, Cylinders, Solenoid & Toroid›Question 52

NEET 2019 · Ampere's Law, Cylinders, Solenoid & Toroid

Ampere's Law, Cylinders, Solenoid & Toroid question from NEET 2019

Q52NEET 2019Easy

Ampere's Law, Cylinders, Solenoid & Toroid

Two toroids 1 and 2 have total no. of turns 200 and 100 respectively with average radii 40 cm and 20 cm respectively. If they carry same current $i$ , the ratio of the magnetic fields along the two loops is,

Show answer and solution

Answer: (b)

For a toroid $B = \dfrac{\mu_0 N i}{2\pi r} \propto \dfrac{N}{r}$ .
$\dfrac{B_1}{B_2} = \dfrac{200/40}{100/20} = \dfrac{5}{5} = 1$ .
So the answer is (b) $1 : 1$ .

Report a mistake

More questions on Ampere's Law, Cylinders, Solenoid & Toroid

A long straight wire of radius a carries a steady current I. The current is uniformly…NEET 2016 (Phase 1)
A 25 cm long solenoid has radius 2 cm and 500 total number of turns. It carries a current…JEE Main 2015 (10 Apr, Shift 1)
A current I flows in an infinitely long wire with cross section in the form of a…JEE Main 2011 (AIEEE)
A long straight wire of radius a carries a steady current i. The current is uniformly…JEE Main 2007 (AIEEE)
A current I flows along the length of an infinitely long, straight, thin walled pipe. ThenJEE Main 2007 (AIEEE)
A long solenoid has 200 turns per cm and carries a current i. The magnetic field at its…JEE Main 2006 (AIEEE)
A current i ampere flows along an infinitely long straight thin walled tube, then the…JEE Main 2004 (AIEEE)
A long solenoid carrying a current produces a magnetic field B along its axis. If the…NEET 2003 (AIPMT)