Inductance

The video tutorial explains inductance using a basic circuit with a battery, resistor, and switch. It covers the transition of current when the switch is closed, the creation of magnetic fields, and the application of Faraday's and Lenz's laws to understand induced EMF and current. The concept of self-inductance is introduced, explaining how circuits oppose changes in current. The tutorial concludes with the derivation of the inductance equation and the units of inductance, known as Henrys.

What happens to the current in a circuit when the switch is initially closed?

• It decreases to zero.

• It gradually increases over time.

• It remains constant.

• It instantly reaches its maximum value.

Which rule helps determine the direction of the magnetic field around a current-carrying wire?

• Ampere's rule

• Left-hand rule

• Right-hand rule

• Fleming's rule

According to Faraday's law, what causes an induced EMF in a circuit?

• A constant magnetic field

• A change in magnetic flux

• A steady current

• A closed circuit

What does Lenz's law state about the direction of induced current?

• It enhances the change in magnetic flux.

• It opposes the change in magnetic flux.

• It is parallel to the magnetic field.

• It is perpendicular to the magnetic field.

What is the term for the opposition of a circuit to its own change in current?

• Inductance

• Resistance

• Self-inductance

• Capacitance

What is the unit of measurement for inductance?

• Tesla

• Henry

• Farad

• Ohm

What is the symbol for an inductor in a circuit diagram?

• A straight line

• A circle

• A zigzag line

• A coil