BTech : Unit I : Batchler of Applied Electronics and Software TechnologyApplied Physics

1. When a ferromagnetic material is heated above curie temperature it becomes...

• Paramagnetic
• Diamagnetic
• Non magnetic
• Strongly charged. 

2. Curie temperature is the temperature at which....

• Magnetic properties stops
• Magnetic properties change its magnetic material
• No change occurs
• Magnetic properties change its temperature

3. Which of the following magnetic material has ferromagnetic properties?

• Phosphorus
• Sulfur
• Nickel
• Carbon

4. The domain structure of Paramagnetic material ....... external magnetic field.

• Remains as it is
• In the same direction of
• In the opposite direction of
• None of these

5. When the diamagnetic substance is placed in external magnetic field.....

• Remains as it is
• In the same direction of
• In the opposite direction of
• None of these

6. The net moment is zero means that material is

• Ferromagnetic
• Antiferromagnetic
• Paramagnetic
• Diamagnetic

7. When the antiparallel orientation of unequal moment occurs, then the material is ...

• Ferromagnetic
• Antiferromagnetic
• Ferrimagnetic
• All of the above

8. Which of the following memories contains a thin film of magnetic material sandwitched between two permanent bias magnets?

• ROM

• Magnetic disk
• Core memory
• Bubble memory

9. Magnetic tape is type of .......

• non-volatile memory 
• volatile memory 
• Both volatile and non-volatile memory 
• Temporary memory

10. Magnetic tape data storage is a system for....

• Attracting different materials
• Magnetising any material
• Storing digital information on magnetic tape 
• None of above

11. Which of the following material is nonmagnetic

• Copper
• Iron
• Stainless Steel
• None of the above