Circuit diagrams and circuit components

The diagram displays a circuit. Which circuit diagram represents this circuit?

May/June 2015

A student measures how long a $1.5\,\text{V}$ cell can supply a constant current of $0.3\,\text{A}$.

May/June 2015

A lamp is linked to the a.c. mains supply in series with a switch and a fuse. Which circuit shows these components connected correctly?

May/June 2016

Which diagram illustrates how the ammeter and voltmeter are arranged so that readings can be taken to determine the power of a lamp?

May/June 2016

Fig. 9.1 shows a circuit diagram. The battery has an electromotive force (e.m.f.) of 12 V.

May/June 2016

Which symbol is used to represent a light-dependent resistor?

May/June 2018

A student has three resistors, and each one is labelled $3.9\,\Omega$, $3\,\text{W}$. She is checking the resistance of one of them.

May/June 2018

What symbol is used for a device that measures current?

May/June 2019

Fig. 8.1 illustrates a potential divider circuit that includes the two resistors $R_1$ and $R_2$.

May/June 2021

The diagram illustrates a simple electric circuit. Which meter is used to measure the current in resistor $R_2$?

May/June 2022

A student examines how the resistance of a filament lamp varies as the current through it is changed.

May/June 2022

Which circuit includes both a heater and a fuse?

May/June 2024

A light-dependent resistor (LDR) is to be used as an input sensor in an intruder alarm circuit. If no light falls on the LDR, the lamp turns on. The resistance of the fixed resistor is lower than the resistance of the lamp. Which diagram represents the circuit?

May/June 2024

Which circuit includes a fuse and a diode?

Oct/Nov 2015

Which diagram shows a lamp connected correctly to the mains supply in a house?

Oct/Nov 2015

An experiment is arranged to explore how the current in a filament lamp varies with the potential difference across it. Which circuit is correct?

Oct/Nov 2015

When finding the power produced by a heater, an ammeter and a voltmeter are placed in the circuit as shown. In relation to the heater, how are these meters connected?

Oct/Nov 2016

A student examines current in a diode. The appearance of the student’s graph is shown in Fig. 3.1.

Oct/Nov 2016

In a circuit, a voltmeter is used to measure the potential difference across a lamp, while an ammeter is used to measure the current in the lamp. Which diagram shows the circuit?

Oct/Nov 2017

Fig. 3.1 illustrates a thermistor. A thermistor is a resistor whose resistance varies with temperature changes. Fig. 3.2 illustrates a circuit that has only been partly completed.

Oct/Nov 2017

Which symbol does not indicate a power source?

Oct/Nov 2019

Which circuit is set up to measure the current in the fixed resistor and the potential difference (p.d.) across that same resistor?

Oct/Nov 2021

A student is examining the current in a resistor that has a fixed resistance. The apparatus available includes an ammeter, electrical connecting leads, a resistor of fixed resistance, a lamp, a switch, a variable resistor, a $6\,\text{V}$ battery, an LED, and a voltmeter.

Oct/Nov 2022

An electric circuit includes a battery, a fixed resistor R, a voltmeter and a thermistor. Fig. 7.1 shows an incomplete circuit diagram of this setup. The thermistor is linked between terminals T$_1$ and T$_2$.

Oct/Nov 2023

A household computer draws a current that ranges from $0.40\,\text{A}$ to $1.2\,\text{A}$ while it is linked to the mains supply. What fuse rating is most appropriate for protecting the computer?

Oct/Nov 2024

Which circuit has both a fuse and a diode?

Oct/Nov 2024