Worksheets2365 602 RJH3
Total questions: 25
Worksheet time: 25mins
Name
Class
Date
1.
What is the unit of electrical capacitance?
a)
Farad
b)
Henry
c)
Ohm
d)
Joule
2.
Which type of current is produced by batteries?
a)
Alternating Current
b)
Direct Current
c)
Pulsating Current
d)
Eddy Current
3.
What is the primary function of a transformer?
a)
Convert AC to DC
b)
Store electrical energy
c)
Change the voltage level
d)
Measure electrical power
4.
Ohm’s Law is represented by which formula?
a)
V = IR
b)
P = IV
c)
Q = CV
d)
F = ma
5.
In an RLC circuit, what does the "L" stand for?
a)
Load
b)
Inductance
c)
Capacitance
d)
Resistance
6.
Which material is commonly used for electrical insulators?
a)
Copper
b)
Aluminium
c)
Silicon
d)
Glass
7.
What is the main disadvantage of a series circuit?
a)
High current
b)
High voltage
c)
If one component fails, the entire circuit fails
d)
Complex design
8.
What does a diode do in a circuit?
a)
Stores energy
b)
Amplifies signals
c)
Allows current to flow in one direction only
d)
Measures voltage
9.
What is the unit of electrical resistance?
a)
Volt
b)
Coulomb
c)
Ohm
d)
Watt
10.
Which law states that the induced electromotive force in any closed circuit is equal to the rate of change of the magnetic flux through the circuit?
a)
Kirchhoff's Law
b)
Faraday's Law
c)
Coulomb's Law
d)
Ampere's Law
11.
What is the purpose of a fuse in an electrical circuit?
a)
To store energy
b)
To convert AC to DC
c)
To break the circuit if the current is too high
d)
To amplify the current
12.
Which component is used to filter out AC signals in a DC circuit?
a)
Resistor
b)
Transformer
c)
Capacitor
d)
Inductor
13.
What is the SI unit of electric charge?
a)
Volt
b)
Ampere
c)
Coulomb
d)
Farad
14.
In a parallel circuit, the total resistance is:
a)
Equal to the sum of the individual resistances
b)
Less than the smallest individual resistance
c)
Greater than the largest individual resistance
d)
Equal to the product of the individual resistances
15.
Which device is used to measure electric current?
a)
Voltmeter
b)
Ammeter
c)
Ohmmeter
d)
Wattmeter
16.
What is the primary purpose of a rectifier?
a)
To change the voltage level
b)
To convert AC to DC
c)
To store electrical energy
d)
To measure electrical resistance
17.
What is the main function of a transistor?
a)
To store charge
b)
To amplify signals
c)
To convert AC to DC
d)
To measure current
18.
In an AC circuit, what does the term "power factor" refer to?
a)
The ratio of real power to apparent power
b)
The product of voltage and current
c)
The phase difference between voltage and current
d)
The resistance of the circuit
19.
Which component is typically used to limit the current in an electrical circuit?
a)
Resistor
b)
Capacitor
c)
Inductor
d)
Transformer
20.
What type of wave is used in alternating current (AC)?
a)
Square wave
b)
Sine wave
c)
Triangle wave
d)
Sawtooth wave
21.
In a three-phase system, how many degrees apart are the phases?
a)
60 degrees
b)
90 degrees
c)
120 degrees
d)
180 degrees
22.
What muliple is reflected by x10-6
a)
Milli
b)
Micro
c)
Nano
d)
Pico
23.
What is the maximum number of electrons that can occupy the third shell of an atom?
a)
8
b)
18
c)
32
d)
50
24.
Which of these is a Conductor
a)
Gold
b)
Rubber
c)
PVC
d)
Silicon
25.
What is the purpose of a Zener diode?
a)
To store energy
b)
To emit light
c)
To allow current to flow in one direction
d)
To regulate voltage
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