MAGNET 🧲🧲 🧲 MCQ(GOVT JOBS)

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MAGNET MCQ (GOVT JOBS)

MAGNET 


An item or substance that generates a magnetic field is called a magnet. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that attracts or repels other magnetic materials, such as iron. Magnets have two poles, typically referred to as the north (N) and south (S) poles. 


Magnets can be naturally occurring, like lodestone, or they can be manufactured. They come in various types, including:


1. **Permanent Magnets**:Over time, these hold onto their magnetic qualities. Neodymium, samarium-cobalt, and ferrite are typical materials.


 2. **Temporary Magnets**: When placed in a strong magnetic field, these behave like permanent magnets; but, when the field is withdrawn, they become less magnetic.



3. **Electromagnets**: These are created by running an electric current through a coil of wire, often wrapped around a core made of a magnetic material like iron. The magnetic field vanishes when the current is stopped.



Magnets have numerous applications in everyday life and technology, from electric motors and generators to data storage devices and medical equipment like MRI machines.


Magnets related MCQ 


1. What is a magnet?

   - A) A material that attracts certain metals

   - B) A material that repels all metals

   - C) A material that can conduct electricity

   - D) A material that can float on water

   - **Answer: A**


2. Which of the following metals is typically not attracted to a magnet?

   - A) Iron

   - B) Nickel

   - C) Aluminum

   - D) Cobalt

   - **Answer: C**


3. What is the region around a magnet where magnetic forces can be detected called?

   - A) Magnetic pole

   - B) Magnetic field

   - C) Magnetic domain

   - D) Magnetic flux

   - **Answer: B**


4. What happens when like poles of two magnets are brought close to each other?

   - A) They attract each other

   - B) They repel each other

   - C) They rotate

   - D) They lose their magnetism

   - **Answer: B**


5. Which type of magnet retains its magnetism for a long period?

   - A) Electromagnet

   - B) Temporary magnet

   - C) Permanent magnet

   - D) Induced magnet

   - **Answer: C**


6. Which of the following materials can be used to make a permanent magnet?

   - A) Copper

   - B) Plastic

   - C) Iron

   - D) Wood

   - **Answer: C**



7. In which of the following applications are electromagnets commonly used?

    - A) Refrigerator doors

    - B) Electric motors

    - C) Jewelry making

    - D) Plastic molding

    - **Answer: B**


8. Which device uses a magnetic needle to indicate direction?

    - A) Barometer

    - B) Thermometer

    - C) Compass

    - D) Anemometer

    - **Answer: C**



9. What is the most common shape of a bar magnet?

    - A) Circular

    - B) Square

    - C) Cylindrical

    - D) Rectangular

    - **Answer: D**



10. What happens to the magnetic field strength when the distance from the magnet increases?

    - A) It increases

    - B) It decreases

    - C) It remains the same

    - D) It fluctuates

    - **Answer: B**


11. What do we call the process of creating a magnet by exposing a material to a strong magnetic field?

    - A) Magnetization

    - B) Demagnetization

    - C) Polarization

    - D) Conduction

    - **Answer: A**


12. What type of magnet is created by passing an electric current through a coil of wire?

    - A) Permanent magnet

    - B) Temporary magnet

    - C) Electromagnet

    - D) Natural magnet

    - **Answer: C**


13. What is the unit of magnetic flux?

    - A) Tesla

    - B) Weber

    - C) Joule

    - D) Coulomb

    - **Answer: B**




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