Session 1.12 PowerPoint Identify equations for electricity

Question 1

What is the equation for electrical power?

Answer 1

Power (P) = Voltage (V) × Current (I).

Question 2

Write the equation for voltage using Ohm’s Law.

Answer 2

Voltage (V) = Current (I) × Resistance (R).

Question 3

How do you calculate current if you know power and voltage?

Answer 3

Current (I) = Power (P) ÷ Voltage (V).

Question 4

Write the formula for resistance in terms of voltage and current.

Answer 4

Resistance (R) = Voltage (V) ÷ Current (I).

Question 5

What does voltage represent in an electrical circuit?

Answer 5

Voltage is the potential difference that pushes charged electrons through a circuit.

Question 6

What does resistance measure in a circuit?

Answer 6

Resistance is a material’s tendency to resist the flow of electric charge, measured in ohms (Ω).

Question 7

What does current measure?

Answer 7

Current measures how much electric charge flows through a circuit per second.

Question 8

What device can be used to measure electrical current in a circuit?

Answer 8

A multimeter.

Question 9

How are resistor values determined?

Answer 9

By colour bands, which represent digits, multipliers, and tolerance.

Question 10

Why are resistors important in engineering projects?

Answer 10

They control current flow, protect components, and are essential in circuits for safety and performance.