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

Magnetic speed sensor

Pressure sensor

Temperature sensor

2 / 40

What is the primary use of magnetic shielding?

Increase signal strength

Reduce interference

Store data

3 / 40

What is a common application of a solenoid?

Electromagnetic lock

Thermistor

Capacitor

4 / 40

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

Copper

Iron

Aluminum

5 / 40

What is the primary use of a superconducting magnet?

MRI machines

Radios

Televisions

6 / 40

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

Soft magnet

Permanent magnet

Superconductor

7 / 40

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

Heat sink

Cathode ray tube

Deflection yoke

8 / 40

What is the function of a magnetic amplifier?

Store electrical energy

Amplify electrical signals

Reduce electrical noise

9 / 40

Which phenomenon is used in magnetic levitation trains?

Electrostatic suspension

Pneumatic suspension

Electromagnetic suspension

10 / 40

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

Capacitor

Transformer

Diode

11 / 40

Which material is known for its high magnetic permeability?

Mu-metal

Copper

Plastic

12 / 40

Which device converts electrical energy into mechanical motion using magnetism?

Resistor

Transformer

Electric motor

13 / 40

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

Touchscreen operation

Camera stabilization

Compass function

14 / 40

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

Engage and disengage power transmission

Measure fuel efficiency

Increase engine power

15 / 40

What type of device uses an electromagnet to produce sound?

Thermocouple

Photovoltaic cell

Loudspeaker

16 / 40

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

RFID chip

Magnetic stripe

QR code

17 / 40

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

DVD drive

Magneto-optical drive

Blu-ray drive

18 / 40

What is a Hall effect sensor used for?

Measuring temperature

Measuring voltage

Detecting magnetic fields

19 / 40

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

Measuring blood pressure

Targeted drug delivery

Monitoring heart rate

20 / 40

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

Higher power consumption

Reduced friction

Increased weight

21 / 40

What is the function of a magnetic sensor?

Generate electricity

Detect magnetic fields

Measure temperature

22 / 40

Which device measures the strength and direction of magnetic fields?

Voltmeter

Magnetometer

Ammeter

23 / 40

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

Nuclear magnetic resonance

Magnetostriction

Eddy currents

24 / 40

Which material is commonly used for making permanent magnets?

Neodymium

Aluminum

Copper

25 / 40

What property of materials determines their magnetic permeability?

Magnetic permeability

Thermal resistance

Electrical conductivity

26 / 40

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

Use hydraulic forces to lift and propel the train

Use air pressure to lift and propel the train

Use magnetic forces to lift and propel the train

27 / 40

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

Resistance

Capacitance

Induced electromotive force

28 / 40

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

Position sensing

Light sensing

Heat sensing

29 / 40

What is the main purpose of a magnetic bearing?

Measure rotational speed

Increase friction in rotating machinery

Reduce friction in rotating machinery

30 / 40

What is the main function of a magnetic relay?

Store energy

Increase voltage

Switch electrical circuits

31 / 40

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

Battery

Generator

Solar panel

32 / 40

What is a common application of ferrite cores in electronics?

Reducing electromagnetic interference

Storing energy

Amplifying signals

33 / 40

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

Thermometer

Tachometer

Barometer

34 / 40

What type of memory uses magnetic storage technology?

Magnetic tape

DRAM

Flash memory

35 / 40

What is the primary function of a magnetic encoder?

Store data

Measure temperature

Measure rotational position

36 / 40

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

Thermal expansion

Optical refraction

Electromagnetic induction

37 / 40

What type of device uses magnetostrictive materials?

LED light

Solar cell

Ultrasonic transducer

38 / 40

What is the purpose of a magnetic latching relay?

Maintain its state without continuous power

Measure current

Convert AC to DC

39 / 40

What device uses magnetic fields to store data?

Solid-state drive

Hard drive

Flash drive

40 / 40

What is the primary purpose of a magnetic tape drive?

Power generation

Data storage

Signal amplification

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