What is the SI unit of voltage?
A Watt
B Volt
C Ampere
D Ohm
Which of the following materials is an insulator?
A Gold
B Aluminum
C Copper
D Rubber
What is the primary function of a transformer?
A To measure current
B To store energy
C To change voltage
D To convert current
What is the basic unit of power in electrical systems?
A Watt
B Ohm
C Ampere
D Volt
Which of the following describes an open circuit?
A Current can flow
B No resistance
C Path is incomplete
D Closed path for current
What does an ammeter measure?
A Voltage
B Resistance
C Power
D Current
What is a primary characteristic of a conductor?
A Blocks current
B Allows current flow
C Stores energy
D High resistance
What is the purpose of a switch in an electrical circuit?
A To control current flow
B To store power
C To measure energy
D To increase voltage
Which of the following is an example of a semiconductor?
A Aluminum
B Iron
C Copper
D Silicon
What does a potentiometer control?
A Power
B Voltage
C Resistance
D Current
What is the relationship between resistance and current?
A Directly related to power
B Directly proportional
C Inversely proportional
D Unrelated
Which of the following components is used to limit current?
A Resistor
B Diode
C Inductor
D Capacitor
What does the term “AC” stand for in electrical systems?
A Alternating charge
B Alternative current
C Ampere current
D Absolute current
What is the function of an inductor in a circuit?
A Measure power
B Store voltage
C Store energy
D Measure current
What does a voltmeter measure?
A Voltage
B Power
C Resistance
D Current