WorksheetsElectronics Quiz
Total questions: 25
Worksheet time: 15mins
What is the unit of electrical resistance?
Volt
Ohm
Ampere
Coulomb
What is the function of a diode in an electronic circuit?
Store electrical energy
Allow current flow in one direction only
Amplify electrical signals
Convert AC to DC
Which of the following is a primary component of a capacitor?
Semiconductor material
Two conductive plates separated by an insulator
Magnetic coil
A moving armature
What is the typical voltage of a standard AA battery?
1.2V
1.5V
3.7V
9V
Which law relates voltage, current, and resistance?
Ohm's Law
Kirchhoff's Voltage Law
Faraday's Law
Coulomb's Law
What type of signal does an analog circuit process?
Binary signals
Continuous signals
Digital pulses
Discrete signals
Which device is used to measure electrical current?
Voltmeter
Ohmmeter
Ammeter
Oscilloscope
What is the function of a transistor in a circuit?
Store electrical energy
Act as a switch or amplifier
Measure voltage
Convert AC to DC
What is the purpose of a heat sink in electronics?
Insulate the circuit
Store charge
Dissipate heat
Amplify signals
Which of the following is a digital logic gate?
Resistor
Capacitor
NAND
Diode
What is the frequency of the mains electricity supply in the UK?
50 Hz
60 Hz
100 Hz
120 Hz
Which type of material is commonly used in semiconductors?
Copper
Silicon
Iron
Plastic
What does LED stand for?
What is the binary equivalent of the decimal number 10?
1010
1100
1001
1110
What is the primary use of an operational amplifier (op-amp)?
Store energy
Amplify electrical signals
Generate AC signals
Rectify DC signals
What is the characteristic of an NPN transistor?
Current flows from the emitter to the collector
Current flows from the collector to the emitter
It blocks all current flow
It is only used in AC circuits
What is the role of a rectifier circuit?
Step up voltage
Step down voltage
Convert AC to DC
Store electrical charge
What does a capacitor do in a DC circuit?
Block DC and pass AC
Pass DC and block AC
Rectify DC voltage
Amplify DC signals
What is the unit of capacitance?
Henry
Farad
Which component protects a circuit from overcurrent?
Diode
Capacitor
Fuse
Transistor
What type of wave does an AC circuit use?
Square wave
Sine wave
Pulse wave
DC wave
What is the typical voltage drop across a silicon diode when conducting?
0.1V
0.3V
0.7V
1.0V
What is the formula for calculating electrical power?
Power = Voltage / Resistance
Power = Voltage × Current
Power = Resistance / Current
Power = Current × Resistance
Which of the following is an example of an active electronic component?
Resistor
Diode
Transistor
Inductor
What happens when resistors are connected in series?
The total resistance decreases
The total resistance increases
The total voltage decreases
