Question: The initial permeability of an iron rod is________________?

• 1. the highest permeability of the iron rod
• 2. the lowest permeability of the iron rod
• 3. the permeability at the end of the iron rod
• 4. the permeability almost in non-magnetised state

Question: Which of the following statements is correct ?

• 1. The magnetic flux inside an exciting coil is lower than its outside surface
• 2. The magnetic flux inside an exciting coil is zero
• 3. The magnetic flux inside the exciting coil is greater than its outside surface
• 4. The magnetic flux inside the exciting coil is same as on its outside surface

Question: The magnetic reluctance of a material______________?

• 1. decreases with increasing cross sectional area of material
• 2. increases with increasing cross-sec-tional area of material
• 3. does not vary with increasing cross-sectional area of material
• 4. any of the above

Question: In a simple magnetic field the strength of magnet flux_______________?

• 1. is constant and has same value in energy part of the magnetic field
• 2. increases continuously from initial value to final value
• 3. decreases continuously from initial value to final value
• 4. first increases and then decreases till it becomes zero

Question: The bar magnet has____________?

• 1. the dipole moment
• 2. monopole moment
• 3. A and B both
• 4. none of the above

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