
Understanding Transformers and CRO
Quiz
•
Physics
•
10th Grade
•
Hard
Nickasius Sindhunata M.Pd
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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the basic principle of a transformer?
Thermal conduction
Capacitance storage
Mechanical leverage
The basic principle of a transformer is electromagnetic induction.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does a transformer change AC voltage levels?
A transformer changes AC voltage levels by converting AC to DC first.
A transformer changes AC voltage levels by using mechanical gears.
A transformer changes AC voltage levels by using a battery to boost the voltage.
A transformer changes AC voltage levels by using electromagnetic induction and the turns ratio of its coils.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are the main components of a transformer?
Inductor, capacitor, resistor
Transformer oil, circuit breaker, voltage regulator
Generator, rectifier, inverter
Primary winding, secondary winding, core, insulation.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Explain the difference between AC and DC current.
DC can change direction periodically.
AC is always stronger than DC.
AC changes direction periodically; DC flows in one direction.
AC is used only in batteries.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are the characteristics of AC current?
Characteristics of AC current include periodic reversal of direction, sinusoidal waveform, frequency measured in hertz, and ability to be transformed to different voltages.
Voltage measured in volts
Constant direction flow
Square waveform
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are the characteristics of DC current?
Bidirectional flow
Variable voltage
Intermittent amplitude
Characteristics of DC current include unidirectional flow, constant voltage, steady amplitude, and fixed polarity.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the formula for calculating transformer efficiency?
Efficiency (η) = (Input Power / Output Power) × 100%
Efficiency (η) = (Output Power + Input Power) × 100%
Efficiency (η) = (Output Power / Input Power) × 100%.
Efficiency (η) = (Output Power - Input Power) × 100%
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