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WorksheetsBasic Electonics
Total questions: 20
Worksheet time: 7mins
LED is an acronym for?
Light Entry Diode
Light Emitting Diode
Light Editing Dipole
Light Eliminating Dipole
Which is not an OUTPUT component in a circuit?
LED
Buzzer
Motor
Switch
Which polarities of this LED are terminals A and B?
A + , B -
A - , B +
A + , B +
A - , B -
This component (in symbol) will .....
rotate
give out light
sense light
make noise
This component (in symbol) will ...
on/off the circuit
control the flow of electricity
rotate
sense light
Which battery symbol is correct?
A
B
C
D
This is a symbol for ....
LED
Motor
Buzzer
none of the above
Resistance in the resistor is measured by..
amperes
volt
ohms
watt
In order for current to flow through the circuit, we ____ the switch.
open
close
Resistors have positive and negative terminals.
False
True
When the wires are crossing each other, which pair is connected and not connected.
A not connected, B connected
A connected, B not connected
Both A and B connected
Both A and B not connected
When the circuit is running, what will component A do?
give out light
resist the current
make sound
rotate
Which statement is correct about LED?
Positive terminal is longer than negative
Both terminals have same length
Negative terminal is longer than positive
Both terminals do not have polarity
The circuit is connected with bulbs in ....
series
parallel
mixed
none of the above
If I want to control more combination of bulbs to on/off, I should put the switch(es) on line....
A only
A and B
B and C
B only
What component is often put before the LED to protect it from excessive current?
wire
switch
resistor
bulb
What do you call A?
wires
clips
pins
terminals
Which is false about A?
It is used for clamping purpose only.
Some components have polarities +/-.
It is used to connect to the circuits.
Current in the circuit will flow through the component via them (A).
If bulb B is not working, will bulb A works?
Yes
No
If LED A and B are damaged, will LED C works?
Yes, LED C is self-driven.
Yes, this is parallel circuit. LED A and B will not affect C.
No, the circuit will stop working.
No, LED A and B will affect C.
