Electromagnetic Induction and AC Circuits Quiz

What is the unit of inductance?

• Amperes

• Volts

• Ohms

• Henries

According to Faraday's Law, what induces voltage in a conductor?

• Change in magnetic flux

• Change in capacitance

• Change in resistance

• Change in electric current

What does the term 'permeability' refer to in the context of inductance?

• Ability to support magnetic field

• Ability to store energy

• Ability to conduct electricity

• Resistance to current

What happens to the current in a coil when AC flows through it?

• It creates a self-induced voltage

• It remains constant

• It increases indefinitely

• It decreases to zero

What is the effect of increasing the number of turns in a coil?

• Decreases resistance

• Decreases inductance

• No effect on inductance

• Increases inductance

What is the formula for inductive reactance?

• XL = 2πfL

• XL = L/f

• XL = f/L

• XL = 2L/f

In a series circuit with a resistor and inductor, how do the voltages behave?

• In phase

• Out of phase

• Equal

• Opposite

What is the primary purpose of a current transformer?

• To increase voltage

• To measure AC current

• To decrease current

• To store energy

What is the relationship between frequency and inductive reactance?

• Exponential relationship

• No relationship

• Inversely proportional

• Directly proportional

What is the primary function of a capacitor in an AC circuit?

• Increase resistance

• Decrease voltage

• Increase current

• Store energy