WorksheetsElectronics 1 - Basic
Total questions: 30
Worksheet time: 15mins
What is the definition of a conductor?
Materials that allows electricity to flow through easily.
Materials that does not allow electricity to flow through easily.
Materials that allow electricity to flow through only under certain conditions.
None of the above
What is the definition of an insulator?
Materials that allows electricity to flow through easily.
Materials that does not allow electricity to flow through easily.
Materials that allow electricity to flow through only under certain conditions.
None of the above
What is the definition of a semiconductor?
Materials that allows electricity to flow through easily.
Materials that does not allow electricity to flow through easily.
Materials that allow electricity to flow through only under certain conditions.
None of the above
Which is an example of conductor?
silver
acrylic
wood
pvc pipe
Which components are semiconductors?
diode, copper wire, buzzer
LED, thermistor, motor
LDR, copper wire, resistor
thermistor, diode, LED
Which is an advantage of mains power supply?
not portable
able to transmit high power over a long distance
requires conversion to DC for electrical appliances
limited power supply
Which is an advantage of battery?
not portable
limited supply of power
stable supply of power over long period of time
can be used directly on products without conversion
Electric current is measured in ___________.
farad
ohms
amperes
watts
Which is true about alternating current (AC)?
it continually changes direction in a circuit
it is able to transmit large amount of power over long distances efficiently
mains power supply has AC
it has to be transformed to DC using transformers
all of the above
Which diagram shows current supply from the mains power?
X
Y
Which diagram shows the current supply from a battery?
X
Y
100mA is equivalent to _________.
1A
0.1A
0.1µA
10µA
Power is measured in ___________.
amperes
ohms
watts
volts
Power(P) is defined by ______________
current (I) x resistance (R)
voltage (V) / current (I)
current (I) x voltage (V)
voltage (V) / resistance (I)
Power(P) is defined by ______________
current (I) x current (I) x resistance (R)
voltage (V) / current (I)
current (I) x resistance (R)
voltage (V) / resistance (I)
Which defines ohm’s law?
I = V/R
P = IV
V = I/R
P = I2R
Which diagram shows a parallel connection?
X
Y
Which diagram shows a series connection?
X
Y
How can the voltage across the bulb X be measured with a voltmeter?
probe across points 1 and 3
probe across points 1 and 5
probe across points 5 and 6
probe across points 2 and 6
How can the current of the circuit be measured?
connect an ammeter in series along point 1
connect an ammeter in series along point 2
connect an ammeter in series along point 3
connect an ammeter in series along point 4
What is the voltage drop across bulb A and bulb B?
bulb A = 6V, bulb B = 6V
bulb A = 3V, bulb B = 3V
What is the voltage drop across bulb C and bulb D, assuming both bulbs are similar?
bulb C = 6V, bulb D = 6V
bulb C = 3V, bulb D = 3V
Which is true about Multimeter?
it is commonly used for troubleshooting electronic circuits
it can be used to measure voltage, resistance and current
none of the above
all of the above
What is the voltage drop across bulb D?
4V
6V
2V
None of the above
The voltage across bulb E is 2V. What are the voltages across bulb G and bulb F?
bulb G = 6V, bulb F = 2V
bulb G = 6V, bulb F = 10V
bulb G = 12V, bulb F = 12V
bulb G = 6V, bulb F = 4V
What happens to bulb B if bulb A fuses?
it will stop working
it will continue to work as normal
it will continue to work but it becomes brighter
Which could be a method to keep the light on for a longer duration?
connect another 6V battery in parallel
increase the voltage of the supply from 6V to 12V
Which circuit will be brighter?
X
Y
both are the same
Which circuit can last longer?
X
Y
They will last the same time.
Which of the following is not an alternative source of energy
solar
tidal
wind
burning fuels
