Basic Electrical Principles City & Guilds 7202

Question 1

What is the unit of electrical current?

Answer 1

Ampere

Question 2

True or False: Voltage is the measure of electrical resistance.

Answer 2

False

Question 3

Fill in the blank: The formula for Ohm’s Law is V = ____ x R.

Answer 3

I

Question 4

What does the symbol ‘R’ represent in electrical formulas?

Answer 4

Resistance

Question 5

What is the unit of electrical resistance?

Answer 5

Ohm

Question 6

Multiple choice: Which of the following is a conductor? A) Rubber B) Copper C) Wood

Answer 6

B) Copper

Question 7

What is the primary function of a circuit breaker?

Answer 7

To protect an electrical circuit from overload or short circuit

Question 8

True or False: AC stands for Alternating Current.

Answer 8

True

Question 9

What is the frequency of standard AC in the UK?

Answer 9

50 Hz

Question 10

Fill in the blank: The power in an electrical circuit is calculated using the formula P = ____ x V.

Answer 10

I

Question 11

What does the acronym ‘LED’ stand for?

Answer 11

Light Emitting Diode

Question 12

Multiple choice: Which component is used to store electrical energy? A) Resistor B) Capacitor C) Inductor

Answer 12

B) Capacitor

Question 13

What is the purpose of an insulator in electrical systems?

Answer 13

To prevent the flow of electricity

Question 14

True or False: Direct Current (DC) flows in one direction.

Answer 14

True

Question 15

What is the formula for calculating electrical power?

Answer 15

P = V x I

Question 16

Fill in the blank: The total resistance in a series circuit is the ____ of individual resistances.

Answer 16

sum

Question 17

What is the unit for electric power?

Answer 17

Watt

Question 18

Multiple choice: Which instrument is used to measure voltage? A) Ammeter B) Voltmeter C) Ohmmeter

Answer 18

B) Voltmeter

Question 19

What does a fuse do?

Answer 19

It protects a circuit by breaking the connection in case of overload.

Question 20

True or False: In parallel circuits, the voltage across each component is the same.

Answer 20

True

Question 21

What is the main difference between AC and DC?

Answer 21

AC changes direction periodically, while DC flows in one direction.

Question 22

Fill in the blank: A ____ is a device that limits the amount of current in a circuit.

Answer 22

resistor

Question 23

What is the primary function of a transformer?

Answer 23

To change the voltage level in an AC circuit.

Question 24

Multiple choice: Which of the following is NOT a type of electrical circuit? A) Series B) Parallel C) Circular

Answer 24

C) Circular

Question 25

What is the purpose of grounding in electrical systems?

Answer 25

To provide a safe path for excess current to prevent electric shock.

Question 26

True or False: The watt is a derived unit of power in the International System of Units.

Answer 26

True