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WorksheetsElectro2 MSW3
Total questions: 20
Worksheet time: 10mins
Name
Class
Date
1.
The rate of electrical energy transfer is known as:
a)
Voltage
b)
Current
c)
Power
d)
Resistance
2.
Which of the following formulas correctly represents electrical power?
a)
P = I/V
b)
P = VI
c)
P = R/I²
d)
P = V²/I
3.
The branch of electrical engineering that deals with the motion of electrons through various mediums is:
a)
Power Generation
b)
Electrical Machines
c)
Electronics
d)
Circuit Theory
4.
In the context of power electronics, 'control' refers to:
a)
Generating electrical energy.
b)
Storing electrical energy.
c)
Regulating electric power transformation and distribution.
d)
Measuring electrical quantities.
5.
A power supply is a device that:
a)
Increases the frequency of AC power.
b)
Regulates the flow of current in a circuit.
c)
Converts one voltage to another.
d)
Generates electrical power from mechanical energy.
6.
The design process of a power supply typically starts from the:
a)
Input and proceeds to the output.
b)
Internal components and then input/output.
c)
Output and works backward to the input.
d)
Primary voltage source.
7.
A rectifier is an electronic circuit used to convert:
a)
DC to AC.
b)
High voltage to low voltage AC.
c)
Low voltage to high voltage DC.
d)
AC to DC.
8.
Which electronic component is fundamental to the operation of a rectifier?
a)
Transistor
b)
Capacitor
c)
Inductor
d)
P-N junction diode.
9.
A half-wave rectifier utilizes how many diodes in its circuit?
a)
One
b)
Two
c)
Four
d)
A bridge configuration.
10.
The theoretical maximum efficiency of a half-wave rectifier is approximately:
a)
0.5
b)
0.406
c)
0.812
d)
1
11.
A full-wave rectifier makes use of _______ of the AC cycle.
a)
Only the positive half.
b)
Only the negative half.
c)
Just the peaks.
d)
The full.
12.
Compared to a half-wave rectifier, a full-wave rectifier generally has:
a)
Lower output voltage.
b)
Higher ripple frequency in the output.
c)
Higher efficiency.
d)
Fewer components.
13.
An inverter is an electronic device that performs the opposite function of a:
a)
Voltage regulator.
b)
Current limiter.
c)
Rectifier.
d)
Amplifier.
14.
What is the primary input power source for an inverter?
a)
AC mains supply.
b)
High-frequency AC.
c)
An external DC source.
d)
A variable AC source.
15.
Inverters are commonly employed in:
a)
Low-power signal processing.
b)
DC voltage regulation.
c)
High-power applications.
d)
Radio frequency transmission.
16.
Which of the following is a basic part of a motor control circuit?
a)
Voltage Divider
b)
Frequency Oscillator
c)
Motor Starter.
d)
Signal Generator
17.
The primary function of a motor starter includes:
a)
Converting AC to DC for the motor.
b)
Generating the rotational motion of the motor.
c)
Measuring the motor's speed.
d)
Controlling motor start/stop.
18.
What is the role of an overload relay in a motor control circuit?
a)
To provide short-circuit protection.
b)
To manually start and stop the motor.
c)
To prevent overheating of the motor.
d)
To control the direction of motor rotation.
19.
A magnetic motor starter utilizes which principle for starting and stopping motors?
a)
Mechanical linkage.
b)
Thermal expansion.
c)
Electromagnetism.
d)
Centrifugal force.
20.
Which component in a motor control circuit can be used to introduce a time delay in the operation of other components?
a)
Control Relay
b)
Overload Relay
c)
Magnetic Motor Starter
d)
Timer.
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