Eduqas GCSE Electronics sequential systems and microcontrollers overview quiz quiz

Half a bit

One bit

Two bits

Eight bits

It uses more gates

Its output depends on the present inputs and on its stored state (it has memory)

It has no clock

Its output depends only on the present inputs

0

1

It stays 0

Undefined

By 1

By 2

By 4

By 10

$250\ \text{Hz}$

$62.5\ \text{Hz}$

$4\ \text{kHz}$

$125\ \text{Hz}$

5

10

25

32

To divide the frequency

To convert the binary code into the pattern of segments for the matching decimal digit

To store the count

To limit the segment current

To increase the brightness to maximum

Each segment is an LED, so it needs a current-limiting resistor to set a safe current

To convert binary to decimal

To store the digit

A fixed logic gate

A programmable processing subsystem with input and output pins

A power supply

A type of sensor

A rectangle

A diamond

A rounded box

An arrow

To amplify the signal by 100

Its very high input resistance stops the next stage loading (pulling down) the divider output

To convert a.c. to d.c.

To divide the frequency

The output supplies only a few milliamps, so a transistor switch handles the larger load current

The transistor converts digital to analogue

The transistor stores the output state

The load needs a higher voltage than the supply