Question 21 : Unit of reluctance is?
1. AWb
2. A²/Wb
3. Wb/A
4. A/Wb
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Question 22 : When the area of cross section of the material increases, what happens to reluctance?
1. Increases
2. Decreases
3. Remains the same
4. Becomes zero
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Question 23 : When the length of the material increases, what happens to reluctance?
1. Increases
2. Decreases
3. Remains the same
4. Becomes zero
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Question 24 : Reluctance is ________________ to the area of cross section the material.
1. Directly proportional
2. Inversely proportional
3. Not related
4. Equal
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Question 25 : Reluctance is ________________ to the length of the material.
1. Directly proportional
2. Inversely proportional
3. Not related
4. Reluctance is ________________ to the length of the material.
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Question 26 : Reciprocal of reluctance is __________
1. Permeance
2. Susceptibility
3. Resistance
4. Conductance
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Question 27 : As the temperature increases beyond the Curie temperature, the relative susceptibility of ferromagnetic materials?
1. Increases
2. Decreases
3. Remains constant
4. Becomes zero
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Question 28 : As the temperature increases up to the Curie temperature, the relative susceptibility of ferromagnetic materials?
1. Increases
2. Decreases
3. Remains constant
4. Becomes zero
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Question 29 : Paramagnetic substances have relative permeability_____________
1. Greater than 1
2. Less than 1
3. Equal to 1
4. Zero
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Question 30 : Diamagnetic substances have relative permeability_____________
1. Greater than 1
2. Less than 1
3. Equal to 1
4. Zero
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