Electrical Current and Circuit Flashcard

Front

What is the unit of electrical current?

Back

Ampere

Front

Which device is used to measure electrical voltage? Options: Ammeter, Voltmeter, Ohmmeter, Multimeter

Back

Voltmeter

Front

In an AC circuit, what is the term for the number of cycles per second?

Back

Frequency

Front

What is Ohm’s Law?

Back

Current = Voltage ÷ Resistance

Front

What is the unit of electrical resistance?

Back

Ohm

Front

Which type of current flows in one direction only?

Back

Direct Current (DC)

Front

Which of the following components controls the flow of current in a circuit? Capacitor, Resistor, Transformer, Relay

Back

Resistor

Front

What is the purpose of a capacitor in an HVAC system?

Back

To store electrical energy

Front

The primary function of a circuit breaker is to:

Back

Protect the circuit from overcurrent

Front

What does a transformer do in an HVAC system?

Back

Converts voltage from high to low or vice versa