Question: How does the magnetic compass needle behave in a magnetic field ?

• 1. It assures a position right angle to magnetic field
• 2. It starts rotating
• 3. It assures a position which follows a line of magnetic flux
• 4. None of the above

Question: Which of the following type of materials are not very important for engineering applications ?

• 1. Ferromagnetic
• 2. Paramagnetic
• 3. Diamagnetic
• 4. None of the above

Question: The stray line of magnetic flux is defined as_____________?

• 1. a line vertical to the flux lines
• 2. the mean length of a ring shaped coil
• 3. a line of magnetic flux in a non-uniform field
• 4. a line of magnetic flux which does not follow the designed path

Question: Which of the following materials are diamagnetic ?

• 1. Silver
• 2. Copper
• 3. Silver and copper
• 4. Iron

Question: For which of the following materials the saturation value is the highest ?

• 1. Ferromagnetic materials
• 2. Paramagnetic materials
• 3. Diamagnetic materials
• 4. Ferrites

Question: The attraction capacity of electromagnet will increase if the_______________?

• 1. core length increases i
• 2. core area increases
• 3. flux density decreases
• 4. flux density increases

Question: The susceptibility of paramagnetic materials generally lies between____________?

• 1. KT3 and 1CT6
• 2. 1CT3 and 1CT7
• 3. KT4 and KT8
• 4. 10″2 and KT5

Question: Temporary magnets are used in______________?

• 1. loud-speakers
• 2. generators
• 3. motors
• 4. all of the above

Question: For which of the following materials the net magnetic moment should be zero ?

• 1. Diamagnetic materials
• 2. Ferrimagnetic materials
• 3. Antiferromagnetic materials
• 4. Antiferrimagnetic materials

Question: Which of the following statements is correct ?

• 1. The conductivity of ferrites is better than ferromagnetic materials
• 2. The conductivity of ferromagnetic materials is better than ferrites
• 3. The conductivity of ferrites is very high
• 4. The conductivity of ferrites is same as that of ferromagnetic materials