Question

Which of the following method(s) can be used to change the direction of force on a current carrying conductor?

1. (i) Changing the magnitude of current
2. (ii) Changing the strength of magnetic field
3. (iii) Changing the direction of current

• A. All
• B. i only
• C. i, ii
• D. iii only

Answer 1

Answer:

D. iii only

• The method of changing the direction of the current can be used to change the direction of the force on a current carrying conductor.

• The direction of force on a current carrying conductor can be reversed by reversing the direction of the current.

• Changing the direction of the current is indeed a valid method to change the direction of the force on a current-carrying conductor in a magnetic field.

• This principle is fundamental to the operation of electric motors