Worksheets2365 602 302/ 5357 103
Total questions: 25
Worksheet time: 25mins
Name
Class
Date
1.
What is the unit of electrical capacitance?
a)
Volt
b)
Farad
c)
Ohm
d)
Ampere
2.
What is the primary function of a transformer?
a)
Store electrical energy
b)
Convert AC to DC
c)
Change voltage levels
d)
Measure current
3.
In an RLC circuit, what does the 'L' stand for?
a)
Load
b)
Light
c)
Inductance
d)
Resistance
4.
Which law states that the total current entering a junction equals the total current leaving?
a)
Ohm's Law
b)
Faraday's Law
c)
Kirchhoff's Current Law
d)
Coulomb's Law
5.
What is the name of the device used to measure electrical resistance?
a)
Voltmeter
b)
Ammeter
c)
Ohmmeter
d)
Wattmeter
6.
In a three-phase system, what is the phase difference between each phase?
a)
90 degrees
b)
60 degrees
c)
120 degrees
d)
180 degrees
7.
Which material is commonly used as a semiconductor?
a)
Iron
b)
Copper
c)
Silicon
d)
Aluminium
8.
What is the relationship between Apparent Power and True Power?
a)
C = A*H
b)
C = Z/R
c)
C = R/Z
d)
C = A - H
9.
How is electrical power calculated in a DC circuit?
a)
P = V/I
b)
P = I²*R
c)
P = V*R
d)
P = V*I
10.
What is the main purpose of a diode in an electrical circuit?
a)
To amplify signals
b)
To store energy
c)
To allow current in one direction
d)
To convert energy
11.
Which phenomenon is described by Lenz's Law?
a)
Electromagnetic induction
b)
Conservation of charge
c)
Induced EMF direction
d)
Electric field strength
12.
What is the SI unit of Inductance?
a)
Siemens
b)
Henry
c)
Joule
d)
Tesla
13.
In which type of circuit are the components connected end-to-end?
a)
Parallel
b)
Series
c)
Mixed
d)
Mesh
14.
What is the primary cause of resistive heating in a conductor?
a)
Magnetic field
b)
Electric field
c)
Electron collisions
d)
Proton collisions
15.
Which component is used to store electrical energy in an electric field?
a)
Resistor
b)
Inductor
c)
Capacitor
d)
Transformer
16.
What is the effect of increasing the frequency on the impedance of an inductor?
a)
Decreases
b)
Increases
c)
Remains constant
d)
Becomes zero
17.
How does the resistance of a conductor change with increasing temperature?
a)
Decreases
b)
Increases
c)
Remains constant
d)
Oscillates
18.
What is the typical voltage of a household electrical outlet in the United Kingdom?
a)
110V
b)
120V
c)
220V
d)
230V
19.
In an AC circuit, what does RMS stand for?
a)
Root Mean Square
b)
Real Mean Square
c)
Random Mean Square
d)
Rectified Mean Square
20.
What is the primary function of a rectifier?
a)
To store electrical energy
b)
To convert AC to DC
c)
To measure voltage
d)
To amplify signals
21.
Which type of current does a battery provide?
a)
Alternating Current
b)
Direct Current
c)
Pulsating Current
d)
Varying Current
22.
What is the main use of a thermistor?
a)
To measure light
b)
To measure temperature
c)
To measure pressure
d)
To measure humidity
23.
In electrical engineering, what does 'EMF' stand for?
a)
Electromagnetic Force
b)
Electromechanical Function
c)
Electromotive Force
d)
Electromagnetic Field
24.
What is the typical frequency of AC mains electricity in the United Kingdom?
a)
50 Hz
b)
60 Hz
c)
100 Hz
d)
120 Hz
25.
Which law relates voltage, current, and resistance in an electrical circuit?
a)
Faraday's Law
b)
Ampere's Law
c)
Ohm's Law
d)
Coulomb's Law
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