A flux density of 2.5mT is developed in free space over an area of 20cm2.
Determine the total flux present.
Re-arranging the formula B = Φ/A to make Φ the subject gives:
Φ = B A thus Φ = 2.5 x 10-3 x 20 x 10-4 = 0.5 x 10-6 Wb
Example 2:
A solenoid comprises 1,000 turns of wire. If the mean length of the magnetic circuit is 0.05m determine the current that must be supplied to the solenoid in order to produce a magnetic field intensity of 200 A/m.
