Electricity

Question 1

Equation for power using voltage and current

Answer 1

P = V × I

Question 2

Equation for power using resistance and current

Answer 2

P = I² × R

Question 3

Equation for power using voltage and resistance

Answer 3

P = V² / R

Question 4

Equation for electromotive force?

Answer 4

ϵ = V + v = IR + Ir

OR

ϵ = E / Q

Question 5

Equation for terminal voltage

Answer 5

V = ϵ - v = ϵ - Ir

Question 6

How does current work in a series circuit?

Answer 6

Current is the same everywhere in a series circuit

Question 7

How does current work in a parallel circuit?

Answer 7

The current in each branch adds up to the total current leaving the cell

Question 8

How does potential difference work in a series circuit?

Answer 8

The potential difference in the power source is equal to the total sum of voltages across all components

Question 9

How does potential difference work in a parallel circuit?

Answer 9

Potential difference across each branch is equal to the potential difference outputted by the power source