Analogue Electronics module quiz: analogue signals, the potential divider, capacitor-resistor time delays and transistor switching (O-Level Electronics) quiz

It varies continuously and can take any value within a range

It can take only two values

It is always a square wave

It cannot change with time

$2\ \text{Hz}$

$500\ \text{Hz}$

$2000\ \text{Hz}$

$0.5\ \text{Hz}$

$V_\text{out} = V_\text{in} \times (R_1 + R_2) / R_2$

$V_\text{out} = V_\text{in} \times R_2 / (R_1 + R_2)$

$V_\text{out} = V_\text{in} \times R_1 / R_2$

$V_\text{out} = V_\text{in} \times R_1 / (R_1 + R_2)$

$4.0\ \text{V}$

$6.0\ \text{V}$

$8.0\ \text{V}$

$2.0\ \text{V}$

The delay becomes shorter

The capacitor stops charging

The delay is unchanged

The delay becomes longer

The base voltage rising high enough to drive a base current

The collector voltage falling

The load disconnecting

The supply being removed

Fall

Rise

Stay constant

Oscillate

A shorter delay

No change in delay

A longer delay

The output never reaches the threshold

The time for one complete cycle

The number of cycles per second

The total height from the lowest to the highest point

The maximum displacement from the zero level

To limit the base current to a safe value

To increase the supply voltage

To store charge

To rectify the signal

$9.0\ \text{V}$

$4.5\ \text{V}$

$3.0\ \text{V}$

$0\ \text{V}$

The on or off state of a switch

A binary number stored in memory

The continuously varying voltage from a microphone

A logic 1 level

Nothing changes

The transistor is destroyed

The supply voltage doubles

The output now rises with light instead of falling, reversing the switching behaviour