Understanding Transformers and CRO

Understanding Transformers and CRO

10th Grade

15 Qs

quiz-placeholder

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Understanding Transformers and CRO

Understanding Transformers and CRO

Assessment

Quiz

Physics

10th Grade

Hard

Created by

Nickasius Sindhunata M.Pd

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15 questions

Show all answers

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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