31. |
Lines of magnetic flux which are parallel and in the same direction __________ each other.
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Answer:
Option (b) |
32. |
The force existing between two infinite parallel conductors is inversely proportional to ________
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Answer:
Option (d) |
33. |
The magnetic field at a point d distance away from long wire due to the electric current I in it is ____________
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Answer:
Option (c) |
34. |
If the radius of the current carrying conductor increases, what is the effect on the force
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Answer:
Option (c) |
35. |
The force per unit length existing between two infinite parallel conductors is given by ___________
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Answer:
Option (a) |
36. |
If the length of current carrying conductor increases, what is the effect on the force?
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Answer:
Option (a) |
37. |
The magnetic field strength of a solenoid can be increased by inserting which of the following materials as the core?
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Answer:
Option (c) |
38. |
What is the formula for the magnetic field due to a solenoid?
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Answer:
Option (a) |
39. |
What happens to the magnetic field in the solenoid when the length of the solenoid increases?
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Answer:
Option (b) |
40. |
What is the expression for force in a current carrying conductor?
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Answer:
Option (c) |