Magnetism

What does Faraday's Law state?

• an electric current is induced when there is a change in magnetic flux within a closed circuit

• magnetic flux is constant in a circuit regardless of change in the magnetic field

• a magnetic field is produced only in the absence of current

• the direction of the induced current is such that it opposes the change in magnetic flux that caused it

What is the main principle of Lenz's Law?

• the induced current always flows in the magnetic flux

• induced current always increases the magnetic flux that causes it

• the direction of the induced current is such that it opposes the change in magnetic flux that caused it

• the induced current always flows in the same direction as the applied current

What is the meaning of self-inductance in an electrical circuit?

• Self-inductance refers to the resistance of a circuit to changes in voltage.
• Self-inductance is the ability to store energy in a capacitor.
• Self-inductance is the process of transferring energy between two circuits.
• Self-inductance is the ability of a circuit to induce an electromotive force in itself due to a change in current.

What is the difference between self-inductance and mutual inductance?

• Self-inductance involves two coils inducing EMF in each other.
• Mutual inductance is the property of a single coil inducing EMF in a circuit.
• Self-inductance and mutual inductance are the same phenomenon.
• Self-inductance relates to a single coil inducing EMF in itself, while mutual inductance involves two coils inducing EMF in each other.

How are Faraday's Law and Lenz's Law related in generating induced currents?

• Faraday's Law and Lenz's Law are unrelated concepts.
• Lenz's Law states that induced currents always increase energy.
• Faraday's Law describes the induction of EMF, while Lenz's Law determines the direction of the induced current.
• Faraday's Law only applies to static magnetic fields.