Test: Electromagnetic Induction - Electrical Engineering (EE) MCQ

It is the dot product of magnetic field vector and area vector.
emf=BAcos(theta), hence if either of the three, that is, magnetic field, area or angle changes, thee emf will change.

A chance in magnetic field induces an emf. When there is an emf, there has to be a current. Hence, when the magnet is moved inside a coil, the current in it increases.

Motor effect is when a current carrying conductor in a magnetic field experiences a force, hence its consequence is electromagnetic induction.

The number of magnetic flux lines per unit area is the magnetic flux, because flux is the number of field lines per unit area.

The formula for induced emf is: emf=Blv, where B is the magnetic field, l is the length of the conductor and v is the velocity with which it is moving in the magnetic field.

The formula for induced emf is: emf=Blv. Substituting the values of B, l and v from the question, we get emf=0.3V.

The formula for induced emf is: emf=Blv. Substituting the values of B, emf and v from the question, we get l=6.25m.

The formula for induced emf is: emf=Blv. Substituting the values of l, emf and v from the question, we get B=4T.

emf stands for electromotive force. It is the voltage developed by any source of electrical energy.

Electromotive force is not actually a force. It is basically a voltage. It is the voltage developed by any source of electrical energy.