Question

Calculate the magnetic flux density if the magnetic field strength is 3A/m.

(a) 4*pi*10^-7T

(b) 8*pi*10^-7T

(c) 10*pi*10^-7T

(d) 12*pi*10^-7T

This question was addressed to me in an interview for internship.

Question is from Permeability of Free Space or Magnetic Constant in chapter Simple Magnetic Circuits of Basic Electrical Engineering

Answer 1

Correct answer is (d) 12*pi*10^-7T

For explanation: We know that:

µ0=B/H

Substituting the value of H from the question, we get B = 12*pi*10^-7T.