Inductors Quiz

What is the property of a coil of wire that opposes a change in current?

• Impedance

• Capacitance

• Inductance

• Resistance

What is the unit of inductance?

• Volt

• Farad

• Henry

• Ohm

When inductors are connected in series, what happens to the total inductance?

• It decreases

• It remains the same

• It becomes zero

• It increases

What is the formula for total inductance when inductors are connected in series?

• L = L1 + L2 + ... + Ln

• L = L1 * L2 * ... * Ln

• L = L1 / L2 / ... / Ln

• L = L1 - L2 - ... - Ln

When inductors are connected in parallel, what happens to the total inductance?

• It remains the same

• It increases

• It decreases

• It becomes zero

What is the phase relationship between current and voltage in a purely inductive circuit?

• There is no phase relationship

• Voltage leads the current by 90 degrees

• Current leads the voltage by 90 degrees

• Current and voltage are in phase

What is inductive reactance?

• Opposition to voltage in an inductor

• Opposition to resistance in an inductor

• Opposition to current in an inductor

• Opposition to power in an inductor

How does inductive reactance change with frequency?

• Is not affected by frequency

• Remains constant with frequency

• Decreases with frequency

• Increases with frequency

What is the formula for induced voltage in an inductor?

• V = L / (di/dt)

• V = L - (di/dt)

• V = L * (di/dt)

• V = L + (di/dt)

How does inductive reactance change with inductance?

• Increases with inductance

• Decreases with inductance

• Remains constant with inductance

• Is not affected by inductance