Question

A circular loop of area \(0.04 \, m^2\) is rotating in a uniform magnetic field of \(0.4 \, T\). The loop rotates about its diameter which is perpendicular to the magnetic field. The magnetic flux through the loop when the plane of the coil is normal to the field and when it is making \(30^\circ\) with the field are respectively (in Wb).

• A. \(1.6 \times 10^{-2}, \; 0.8 \times 10^{-2}\)
• B. \(1.6 \times 10^{-2}, \; 1.386 \times 10^{-2}\)
• C. \(0, \; 0.8 \times 10^{-2}\)
• D. \(1.386 \times 10^{-2}, \; 0\)

Hint:

Always remember: magnetic flux depends on angle between field and normal, not plane.

Answer 1

The Correct Option is B