WJEC GCSE Electronics applications of diodes quiz quiz

in both directions equally

in one direction only

only when cold

only at high frequency

0.7 V

0.0 V

2.0 V

5.0 V

From cathode to anode

In whichever direction is larger

The way the triangle symbol points (anode to cathode)

It does not flow at all

increasing the voltage

smoothing the current

storing charge

blocking the current if the battery is connected the wrong way round

To absorb the voltage spike when the coil is switched off

To make the relay louder

To convert DC to AC

To increase the coil resistance

Converts DC into AC

Converts AC into DC

Increases the frequency

Stores energy

Full-wave

No

Half-wave

Three-phase

A perfectly smooth straight line

A pure sine wave

A constant negative voltage

Positive humps with flat gaps where the other half-cycles are removed

in reverse, in its breakdown region

forward biased only

as an amplifier

as a sensor

rises steadily with current

stays almost constant at the Zener voltage

falls to zero

doubles

To increase the output voltage

To act as the load

To limit the current and absorb changes in the supply voltage

To convert AC to DC

910 Ω

510 Ω

200 Ω

390 Ω

It behaves like an ordinary diode and conducts at about 0.7 V

It explodes immediately

It holds the Zener voltage

Nothing ever happens

only the load current

the Zener current plus the load current

no current at all

only the Zener current