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Basics of Electricity and Circuits Quiz

#1

What is the SI unit of electric current?

Amperes
Explanation

The SI unit of electric current is Amperes.

#2

Which component of a circuit restricts the flow of current?

Resistor
Explanation

A resistor is a component in a circuit that restricts the flow of current.

#3

What is the unit of electrical power?

Watts
Explanation

The unit of electrical power is Watts.

#4

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

Rubber
Explanation

Rubber is commonly used as an insulator in electrical wires.

#5

What is the formula to calculate electrical power?

P = V * I
Explanation

The formula to calculate electrical power is P = V * I.

#6

Which law states that the total current entering a junction is equal to the total current leaving the junction?

Kirchhoff's Current Law
Explanation

Kirchhoff's Current Law states that the total current entering a junction is equal to the total current leaving the junction.

#7

What does the term 'AC' stand for in the context of electricity?

Alternating Current
Explanation

In electricity, 'AC' stands for Alternating Current.

#8

In a series circuit, how does the total resistance compare to individual resistances?

It is equal to the sum of individual resistances
Explanation

In a series circuit, the total resistance is equal to the sum of individual resistances.

#9

What does 'DC' stand for in electrical circuits?

Direct Current
Explanation

'DC' in electrical circuits stands for Direct Current.

#10

What is the purpose of a diode in a circuit?

To control the flow of current
Explanation

The purpose of a diode in a circuit is to control the flow of current.

#11

What is the unit of electrical resistance?

Ohms
Explanation

The unit of electrical resistance is Ohms.

#12

What happens to the total resistance in a parallel circuit as more resistors are added?

It decreases
Explanation

In a parallel circuit, the total resistance decreases as more resistors are added.

#13

What is Kirchhoff's Voltage Law (KVL) used to determine?

The total voltage in a closed loop circuit
Explanation

Kirchhoff's Voltage Law (KVL) is used to determine the total voltage in a closed loop circuit.

#14

What is the resistance of a superconductor at very low temperatures?

Zero
Explanation

The resistance of a superconductor at very low temperatures is zero.

#15

What is the unit of electric charge?

Coulombs
Explanation

The unit of electric charge is Coulombs.

#16

In a DC circuit, what happens to the voltage and current across a resistor connected in series?

Voltage remains constant, current varies
Explanation

In a DC circuit, the voltage across a resistor connected in series remains constant, while the current varies.

#17

What is the unit of magnetic flux?

Weber
Explanation

The unit of magnetic flux is Weber.

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