Magnetic Devices MCQs with Answers

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Magnetic Devices Online Quiz

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• Test Name: Magnetic Devices MCQ Quiz Practice
• Type: Quiz Test
• Total Questions: 40
• Total Marks: 40
• Time: 40 minutes

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Magnetic Devices

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1 / 40

What device uses magnetic fields to store data?

Solid-state drive

Flash drive

Hard drive

2 / 40

Which device converts electrical energy into mechanical motion using magnetism?

Electric motor

Resistor

Transformer

3 / 40

What is the primary material used in the core of an electromagnet?

Copper

Iron

Aluminum

4 / 40

Which device uses magnetic fields to read and write data on optical discs?

DVD drive

Magneto-optical drive

Blu-ray drive

5 / 40

What type of device uses magnetic flux to measure rotational speed?

Barometer

Thermometer

Tachometer

6 / 40

What is the primary use of a superconducting magnet?

Televisions

Radios

MRI machines

7 / 40

What is a common application of a solenoid?

Electromagnetic lock

Thermistor

Capacitor

8 / 40

What is the primary purpose of a magnetic tape drive?

Power generation

Signal amplification

Data storage

9 / 40

What is the purpose of a magnetic latching relay?

Maintain its state without continuous power

Measure current

Convert AC to DC

10 / 40

What is a Hall effect sensor used for?

Measuring voltage

Measuring temperature

Detecting magnetic fields

11 / 40

What property of materials determines their magnetic permeability?

Thermal resistance

Magnetic permeability

Electrical conductivity

12 / 40

Which principle is employed by magnetic flow meters to measure fluid velocity?

Electromagnetic induction

Thermal expansion

Optical refraction

13 / 40

Which phenomenon is used in magnetic levitation trains?

Electrostatic suspension

Pneumatic suspension

Electromagnetic suspension

14 / 40

What type of device uses magnetostrictive materials?

LED light

Solar cell

Ultrasonic transducer

15 / 40

What is the role of a magnetic clutch in automotive applications?

Measure fuel efficiency

Engage and disengage power transmission

Increase engine power

16 / 40

What type of sensor is commonly used in anti-lock braking systems (ABS)?

Magnetic speed sensor

Temperature sensor

Pressure sensor

17 / 40

What is a common application of ferrite cores in electronics?

Reducing electromagnetic interference

Storing energy

Amplifying signals

18 / 40

Which phenomenon is utilized in magnetic resonance imaging (MRI)?

Magnetostriction

Eddy currents

Nuclear magnetic resonance

19 / 40

What is the function of a magnetic sensor?

Measure temperature

Generate electricity

Detect magnetic fields

20 / 40

What is the primary function of a magnetic encoder?

Measure temperature

Measure rotational position

Store data

21 / 40

What is the function of a magnetic amplifier?

Store electrical energy

Amplify electrical signals

Reduce electrical noise

22 / 40

What is a primary application of a magneto-resistive sensor?

Light sensing

Position sensing

Heat sensing

23 / 40

What is the purpose of using magnetic nanoparticles in medical applications?

Targeted drug delivery

Monitoring heart rate

Measuring blood pressure

24 / 40

What is the primary use of magnetic shielding?

Reduce interference

Store data

Increase signal strength

25 / 40

What is the function of a magnetic levitation (maglev) train?

Use magnetic forces to lift and propel the train

Use hydraulic forces to lift and propel the train

Use air pressure to lift and propel the train

26 / 40

Which material is known for its high magnetic permeability?

Copper

Mu-metal

Plastic

27 / 40

Which device uses magnetic fields to deflect electron beams in CRT monitors?

Cathode ray tube

Deflection yoke

Heat sink

28 / 40

What is the main function of a magnetic relay?

Switch electrical circuits

Store energy

Increase voltage

29 / 40

What device uses the principle of electromagnetic induction to generate electricity?

Solar panel

Generator

Battery

30 / 40

What is the main advantage of using a magnetic levitation (maglev) system?

Higher power consumption

Reduced friction

Increased weight

31 / 40

Which material is commonly used for making permanent magnets?

Copper

Neodymium

Aluminum

32 / 40

What type of magnetic device is used in credit cards for storing information?

RFID chip

Magnetic stripe

QR code

33 / 40

What type of device uses an electromagnet to produce sound?

Loudspeaker

Photovoltaic cell

Thermocouple

34 / 40

What is the key principle behind the operation of an inductor?

Capacitance

Induced electromotive force

Resistance

35 / 40

What is the purpose of a magnetic field sensor in a smartphone?

Compass function

Touchscreen operation

Camera stabilization

36 / 40

What device uses magnetic fields to transfer electrical energy between two circuits?

Diode

Transformer

Capacitor

37 / 40

What is the main purpose of a magnetic bearing?

Measure rotational speed

Reduce friction in rotating machinery

Increase friction in rotating machinery

38 / 40

Which type of magnetic material retains its magnetism after the external magnetic field is removed?

Permanent magnet

Soft magnet

Superconductor

39 / 40

What type of memory uses magnetic storage technology?

Magnetic tape

DRAM

Flash memory

40 / 40

Which device measures the strength and direction of magnetic fields?

Voltmeter

Ammeter

Magnetometer

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