When a 5 A current is made to flow through a coil of 20 turns produce a flux of 10 Wb. Find the voltage across the coil if the rate of change of current through the coil is 8 mA/s.

Look carefully at the figure and answer the following questions. For your answers choose between on the right, on the left and it is zero; there are no more options. (a) When the switch is “open” i. Where does the current flow in the battery? ii. Where is the magnetic flux going in the bar on the left? iii. Where does the magnetic flux go in the bar on the right? iv. Where does the current flow in the resistor?

If a wire or coil with an open circuit is moved through a magnetic field . O nothing will happen O a current will be generated through the coil O it depends on the speed O an EMF will be generated in or across the coil

How many turns are on a coil if a current of 3.8A produces a magnetic flux of 2.7mWb in a magnetic circuit having a reluctance of 1.4 MA-turns/Wb