#1
Which tool is used to measure electrical current?
Ammeter
ExplanationAmmeter measures electrical current.
#2
What is the SI unit of electrical resistance?
Ohm
ExplanationOhm is the SI unit of electrical resistance.
#3
What is the primary function of a fuse in an electrical circuit?
To interrupt excessive current flow
ExplanationFuse interrupts excessive current flow to protect the circuit.
#4
What is the unit of electrical power?
Watt
ExplanationWatt is the unit of electrical power.
#5
What is the function of a circuit breaker in an electrical system?
To interrupt the circuit during overload or short circuit conditions
ExplanationCircuit breaker interrupts circuit during overload or short circuit.
#6
Which law states that the total current entering a junction is equal to the total current leaving the junction in a circuit?
Kirchhoff's Current Law
ExplanationKirchhoff's Current Law states conservation of current in circuits.
#7
What does an oscilloscope measure?
Voltage
ExplanationOscilloscope measures voltage in electrical circuits.
#8
What is the function of a multimeter in electrical testing?
To measure multiple electrical quantities such as voltage, current, and resistance
ExplanationMultimeter measures various electrical quantities.
#9
In an AC circuit, what does the phase angle represent?
Time delay between voltage and current
ExplanationPhase angle in AC circuit represents time delay between voltage and current.
#10
What is the purpose of a diode in an electrical circuit?
To control the flow of current in one direction
ExplanationDiode controls current flow in one direction.
#11
Which component of an electrical circuit dissipates power as heat?
Resistor
ExplanationResistor dissipates electrical power as heat.
#12
What is the purpose of a transistor in an electrical circuit?
To amplify or switch electronic signals
ExplanationTransistor amplifies or switches electronic signals in a circuit.