GCSE Physics – Electricity- 1 – Exam Style Questions with Answers

Figure 1 gives the power output of three electric kettles.
A student investigated how the power output of a kettle affected the time taken to boil a fixed volume of water.
The water in all three kettles had an initial temperature of 25 °C.
What type of variable was the time?

An electrical circuit is shown in the figure below.
The current in the circuit is direct current.
What is meant by direct current?

To get a range of results, hot water at 60 °C was poured into the beaker.
The temperature of the water and current through the thermistor were then recorded as the water cooled.
The results of the investigation are shown in Figure 2.
The potential difference across the thermistor stays the same all through the investigation.
What conclusion can be made from the results in Figure 2 about the resistance of the thermistor as the temperature of the thermistor decreases?

Figure 1 shows a circuit diagram.
In which position could a switch be placed so that both lamps can be switched on or off at the same time?

The graph below shows how the current through a filament lamp changes after the lamp is switched on.
The normal current through the filament lamp is 1.5 A.
For how many seconds is the current through the filament lamp greater than 1.5 A?

A student investigated how the resistance of a piece of nichrome wire varies with length.
Figure 1 shows part of the circuit the student used.
Why would switching off the circuit between readings have improved the accuracy of the student’s investigation?

The graph below shows a graph of current against potential difference for a different type of solar cell.
The power output of the solar cell is calculated using the equation.
power = current × potential difference
Which value of potential difference on the graph above gives the maximum power output of the solar cell?

A student built Circuit X and Circuit Y shown in Figure 2.
The components used in each circuit were identical
How would the reading on the ammeter in Circuit Y compare to the reading on the ammeter in Circuit X?