Eduqas GCSE Electronics electronic systems and circuit concepts overview quiz quiz

To drive an output transducer such as a lamp or motor

To sense a physical quantity and turn it into an electrical signal

To make a decision or change the signal

To supply power to the rest of the circuit

A signal that can take any value and varies smoothly

A signal that has only two valid levels, logic 0 and logic 1

A signal that is always increasing

A signal measured only in amperes

$200\ \Omega$

$320\ \Omega$

$0.2\ \Omega$

$5\ \Omega$

The voltage

The current

The resistance

The power

$800\ \Omega$

$400\ \Omega$

$200\ \Omega$

$100\ \Omega$

$P = VI$

$P = I^2 R$

$P = \frac{V^2}{R}$

$P = \frac{Q}{t}$

$120\ \text{J}$

$13.3\ \text{J}$

$43\ \text{J}$

$0.075\ \text{J}$

So it draws more current

So it does not overheat, drift in value or burn out

So its resistance increases

So it can be measured with a voltmeter

In series with the component

In parallel with (across) the component

In place of the component

Between the two supply rails only

Leave the circuit powered and connected

Disconnect the component and switch the power off

Connect it in parallel with the supply

Set the oscilloscope time base

$2\ \text{Hz}$

$500\ \text{Hz}$

$2000\ \text{Hz}$

$250\ \text{Hz}$

The exact value of every resistor

The overall structure as labelled subsystems with signal-flow arrows

The colour codes of the components

The power rating of each resistor