P4.5 Parallel circuits

Question 1

In a whole circuit, what is the rule with total current

Answer 1

The total current through the whole circuit is the sum of the currents through the separate branches

Question 2

In a parallel circuit, what is the rule with potential difference

Answer 2

For components in parallel, the potential difference across each component is the same

Question 3

What happens to the current if the resistance of a component is big

Answer 3

The current is smaller

Question 4

What is the equation for the current passing through each component

Answer 4

current (A) =
potential difference
/
component resistance

Question 5

In a parallel circuit, what is the rule with resistance

Answer 5

The total resistance of two (or more) components in parallel is less than the resistance of the resistor with the least resistance