Fundamentals of Electrical Engineering

What is the unit of electric current?

• watt

• ohm

• ampere

• volt

Define Ohm's Law.

• Ohm's Law defines the relationship between voltage, current, and resistance in an electrical circuit.

• Ohm's Law describes the behavior of magnetic fields in circuits.

• Ohm's Law relates energy consumption to time in electrical devices.

• Ohm's Law states that power is equal to voltage times current.

What is the formula for calculating power in an electrical circuit?

• P = V - I

• P = V × I

• P = I / V

• P = V + I

What is the difference between AC and DC current?

• DC is used in household appliances

• AC is a type of battery current

• AC is safer than DC

• AC reverses direction periodically; DC flows in one direction.

What does a capacitor do in a circuit?

• A capacitor amplifies electrical signals in a circuit.

• A capacitor converts electrical energy into heat.

• A capacitor stores and releases electrical energy in a circuit.

• A capacitor acts as a resistor in a circuit.

Explain the concept of resistance.

• Resistance is the speed of electric current flow.

• Resistance is the measure of voltage in a circuit.

• Resistance is the opposition to the flow of electric current.

• Resistance is the total energy consumed by a circuit.

What is the purpose of a transformer?

• To change the voltage of alternating current in a circuit.

• To increase the current in a circuit.

• To convert direct current to alternating current.

• To store electrical energy for later use.

What is Kirchhoff's Voltage Law?

• The sum of the voltages around a closed loop in a circuit is zero.

• The power consumed in a circuit is equal to the voltage times the current.

• The total current in a circuit is constant.

• The resistance in a circuit is always zero.

What is the function of a diode?

• The function of a diode is to allow current to flow in one direction while blocking it in the opposite direction.

• To convert AC to DC voltage.

• To store electrical energy for later use.

• To allow current to flow in both directions equally.

Define inductance.

• Inductance is the property of a conductor that allows it to dissipate heat efficiently.

• Inductance is the property of a conductor that quantifies its ability to store energy in a magnetic field.

• Inductance is the measure of a conductor's resistance to electric current.

• Inductance refers to the ability of a material to conduct electricity without resistance.