Unit 2- Electrical principles & technologies

Question 1

What is the unit of electric current?

Answer 1

Ampere (A)

Question 2

True or False: Voltage is the measure of electric potential energy per unit charge.

Answer 2

True

Question 3

Fill in the blank: The formula for calculating resistance (R) in ohms is R = V / ___.

Answer 3

I

Question 4

What does the acronym ‘AC’ stand for in electrical terms?

Answer 4

Alternating Current

Question 5

What is the primary function of a circuit breaker?

Answer 5

To protect an electrical circuit from damage caused by overload or short circuit.

Question 6

Multiple Choice: Which of the following materials is a good conductor of electricity? A) Rubber B) Copper C) Wood D) Glass

Answer 6

B) Copper

Question 7

What is Ohm’s Law?

Answer 7

V = I * R

Question 8

True or False: Series circuits have the same current flowing through all components.

Answer 8

True

Question 9

Fill in the blank: The device used to measure electric current is called an ___.

Answer 9

Ammeter

Question 10

What is the role of a resistor in a circuit?

Answer 10

To limit the flow of electric current.

Question 11

Multiple Choice: Which of the following is an example of a renewable energy source? A) Coal B) Solar C) Natural Gas D) Nuclear

Answer 11

B) Solar

Question 12

What is the difference between series and parallel circuits?

Answer 12

In series circuits, components are connected end-to-end, while in parallel circuits, components are connected across the same voltage source.

Question 13

True or False: The total resistance in a parallel circuit is always less than the smallest resistance in the circuit.

Answer 13

True

Question 14

Fill in the blank: The measure of how much electrical energy is converted to heat in a resistor is called ___.

Answer 14

Power

Question 15

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

Answer 15

To store and release electrical energy.

Question 16

Multiple Choice: What is the typical voltage in a household electrical outlet in North America? A) 120V B) 240V C) 60V D) 30V

Answer 16

A) 120V

Question 17

What does the term ‘grounding’ refer to in electrical systems?

Answer 17

Connecting an electrical circuit to the earth to prevent electrical shock.

Question 18

True or False: Electrical energy can be transformed into other forms of energy such as light, heat, and motion.

Answer 18

True

Question 19

Fill in the blank: The flow of electric charge is known as ___.

Answer 19

Current