A technician reverses the direction of current in a conductor placed in a magnetic field. According to Fleming's Left Hand Rule, what will happen to the direction of force on the conductor?
The force direction will reverse
Fleming's Left Hand Rule: stretch the thumb, forefinger and middle finger of the left hand mutually perpendicular. The forefinger points along the magnetic field, the middle finger along the current, and the thumb gives the direction of the force on the conductor.
If the current is reversed while the field stays the same, the middle finger must point the opposite way, and the thumb then points in the opposite direction.
The magnitude of the force (F = BIL) is unchanged, since the field, current and length are the same; only its direction changes.
Hence, the answer is the force direction will reverse.
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Important Questions from Magnetism
The magnet used to lift and transport heavy loads like big metals, steel girders and scrap iron objects for loading and unloading purposes is known as____.
A suspended bar magnet is rotated. It will come to rest in the north-south direction. This shows that the earth has its own_______.
When a bar magnet is cut into two equal parts, then:
Consider the following statements about a magnetic field.
(i) A magnetic field has both magnitude and direction.
(ii) The direction of magnetic field lines inside a bar magnet is from its south pole to its north pole.
(iii) Magnetic field lines are closed curves.
Select the correct option.
What will happen if a collection of positive and negative charges are passed at a high speed through a magnetic field which is perpendicular to the direction of motion of the charges? (Assume that both kind of charges are NOT going to recombine)
