What is the name of plug wire that switches are always connected to?
Live
Neutral
Earth
What kind of circuit is a power ring?
Series
Parallel
Lighting
What does the following circuit symbol represent?
Resistor
Variable resistor
Fuse
What is resistance a measure of?
A measure of its support for current
A measure of current
A measure of its opposition to a flow of current
What is the energy transformation inside a resistor?
Heat to electrical
Electrical to heat
Electrical to light
Which of the following is a way of increasing the current in an electrical circuit?
Increasing the voltage
Increasing the resistance
Decreasing the voltage
What happens to the resistance when more lamps are added in series?
Nothing, it stays the same
It increases
It decreases
Which of the following is the correct relationship between voltage, current and resistance?
\[\text{Resistance} = \text{voltage} \div \text{current}\]
\[\text{Resistance} = \text{current} \div \text{voltage}\]
\[\text{Resistance} = \text{voltage} \times \text{current}\]
What is the resistance of a resistor that has a voltage of \(6\, V\) and a current of \(2\, A\)?
\[3\, \Omega\]
\[12\, \Omega\]
\[0.3\, \Omega\]
What is the resistance of a lamp that has a voltage of \(9\, V\) and a current of \(1.5\, A\)?
\[13.5\, \Omega\]
\[6\, \Omega\]
\[0.17\, \Omega\]
What is the resistance of a heater that has a voltage of 230 V and a current of 10 A?
\[2300\, \Omega\]
\[0.04\, \Omega\]
\[23\, \Omega\]