MCQ in electrical and electronics Quiz Practice…

Q: What is the unit of electric charge?

Coulomb — Coulomb is the SI unit for electric charge, representing the quantity of electricity.

Q: Which component opposes the flow of current in a circuit?

Resistor — A resistor's primary function is to resist current flow, converting electrical energy into heat.

Q: What is the relationship between voltage, current, and resistance in a circuit?

Ohm's Law — Ohm's Law states the relationship: Voltage = Current x Resistance (V=IR).

Q: In a series circuit, what is constant across all components?

Current — In a series circuit, the same current flows through each component.

Q: What type of signal is characterized by its continuously changing amplitude and frequency?

Analog — Analog signals have continuous values representing the signal's information, unlike digital.

Q: Which logic gate outputs a HIGH signal only if all inputs are HIGH?

AND — The AND gate requires all inputs to be HIGH for a HIGH output.

Q: What is the purpose of a capacitor in a circuit?

To store electrical energy — Capacitors store electrical energy in an electric field.

Q: Which component allows current to flow in only one direction?

Diode — Diodes act as a one-way valve, allowing current flow in one direction (forward bias).

Q: What is the SI unit of power?

Watt — The Watt (W) is the SI unit for power, which is the rate of energy transfer.

Q: What is the function of a transformer?

To change the voltage of an AC circuit. — Transformers step up or step down AC voltage using electromagnetic induction.

Question 1 of 10

What is the unit of electric charge?

Coulomb is the SI unit for electric charge, representing the quantity of electricity.

Question 2 of 10

Which component opposes the flow of current in a circuit?

A resistor's primary function is to resist current flow, converting electrical energy into heat.

Question 3 of 10

What is the relationship between voltage, current, and resistance in a circuit?

Ohm's Law states the relationship: Voltage = Current x Resistance (V=IR).

Question 4 of 10

In a series circuit, what is constant across all components?

In a series circuit, the same current flows through each component.

Question 5 of 10

What type of signal is characterized by its continuously changing amplitude and frequency?

Analog signals have continuous values representing the signal's information, unlike digital.

Question 6 of 10

Which logic gate outputs a HIGH signal only if all inputs are HIGH?

The AND gate requires all inputs to be HIGH for a HIGH output.

Question 7 of 10

What is the purpose of a capacitor in a circuit?

Capacitors store electrical energy in an electric field.

Question 8 of 10

Which component allows current to flow in only one direction?

Diodes act as a one-way valve, allowing current flow in one direction (forward bias).

Question 9 of 10

What is the SI unit of power?

The Watt (W) is the SI unit for power, which is the rate of energy transfer.

Question 10 of 10

What is the function of a transformer?

Transformers step up or step down AC voltage using electromagnetic induction.

MCQ in electrical and electronics Quiz