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Fundamentals of Electrical Systems and Components Quiz

#1

What is the unit of electrical resistance?

Ohm
Explanation

Ohm is the SI unit of electrical resistance.

#2

Which component is used to store electrical charge?

Capacitor
Explanation

A capacitor is a component that stores electrical charge.

#3

What is the SI unit of electric charge?

Coulomb
Explanation

The Coulomb is the SI unit of electric charge.

#4

Which type of circuit allows only one path for current flow?

Series circuit
Explanation

A series circuit allows only one path for current flow.

#5

What is the unit of electric current?

Ampere
Explanation

Ampere is the unit of electric current.

#6

Which component is commonly used to control the flow of current in a circuit?

Transistor
Explanation

A transistor is commonly used to control the flow of current in a circuit.

#7

What does AC stand for in electrical systems?

Alternating Current
Explanation

AC stands for Alternating Current in electrical systems.

#8

Which law states that the voltage across a conductor is directly proportional to the current passing through it?

Ohm's Law
Explanation

Ohm's Law states that the voltage across a conductor is directly proportional to the current.

#9

What is the function of a transformer in an electrical system?

To regulate voltage
Explanation

A transformer's function in an electrical system is to regulate voltage.

#10

Which material is commonly used as an insulator in electrical systems?

Rubber
Explanation

Rubber is commonly used as an insulator in electrical systems.

#11

What is the purpose of a fuse in an electrical circuit?

To prevent overcurrent
Explanation

A fuse's purpose in an electrical circuit is to prevent overcurrent.

#12

Which law states that the total current entering a junction equals the total current leaving the junction in a circuit?

Kirchhoff's Current Law
Explanation

Kirchhoff's Current Law states that the total current entering a junction equals the total current leaving the junction.

#13

What is the purpose of a diode in an electrical circuit?

To allow current flow in one direction only
Explanation

A diode allows current flow in one direction only in an electrical circuit.

#14

What does LED stand for in electronics?

Light Emitting Diode
Explanation

LED stands for Light Emitting Diode in electronics.

#15

What is the function of a relay in an electrical system?

To control a high-power circuit with a low-power signal
Explanation

A relay's function in an electrical system is to control a high-power circuit with a low-power signal.

#16

What is the purpose of an inverter in an electrical system?

To convert DC to AC
Explanation

An inverter's purpose in an electrical system is to convert DC to AC.

#17

What is the purpose of a potentiometer in an electrical circuit?

To provide variable resistance
Explanation

A potentiometer's purpose in an electrical circuit is to provide variable resistance.

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