9th Class Physics Chapter 8 TestMagnetism

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. Which of the following is non-diamagnetic material?

   1. Cobalt

   2. Copper

   3. Bismuth

   4. Water

2. 1000 years ago, the Greeks a rock called ......:

   1. Magnetic

   2. Lode stone

   3. Materials

   4. Iron

3. Which of the following is example of permanent magnetic material?

   1. Cobalt

   2. Alnico

   3. Ferrite

   4. All of these

4. Which of the following recording technologies uses magnets to store data:

   1. Compact disk

   2. Digital vasa tile

   3. Magnetic tape

   4. None

5. Magnetic lines force:

   1. Are always directed in a straight line

   2. Cross one another

   3. Enter into the north pole

   4. Enter into the south pole

6. Which is the magnetic field strength at the center of the circular coil?

   1. Maximum

   2. Minimum

   3. Zero

   4. Constant

7. Soft iron is often used to shield which of the following?

   1. Electric field

   2. Magnetic field

   3. Electro magnetic field

   4. None of these

8. Magnetism is a ...... that act at a distance upon magnetic materials:

   1. Energy

   2. Force

   3. Work

   4. All of these

9. Most common magnetic recording medium are:

   1. Magnetic tapes

   2. Disk recorders

   3. Magnetic field

   4. Both A and B

10. Can we get N-pole and S-pole separately?

    1. Yes

    2. No

    3. Both A and B

    4. None of these