Question

An experiment to determine the local magnetic field of the Earth uses a coil consisting of 250  individual loops, each of area 11.2 cm2 . The coil is rotated and the resultant induced EMF is used to determine the magnetic field. The coil is rotated in a time interval of 5.00×10⁻² s from a position where its plane is perpendicular to the earth's magnetic field to one where its plane is parallel to the field. The earth's magnetic field at the lab location is 5.5×10⁻⁵ T.

What is the magnetic flux through each turn of the coil before it is rotated?

Answer 1

Solution:

The magnetic flux is given by

Magnetic flux = BA

So MF = 5.5 x 10^-5 x 11.2 / 10000

To convert area into square meters I have decided by 10000.

Now MF = 6.16 x 10^-8 Weber or Tm2.

To calculate total flux multiply the number of loops with above.

And to find EMF divide by Time interval because final flux is zero.