Question

15. To use your left hand to determine the direction of the voltage developed in a moving conductor in a stationary magnetic field, you must point your A. forefinger in the direction of the motion. B. forefinger in the direction of the lines of force. C. thumb in the direction of the electromagnetic force. D. thumb in the direction of the magnetic flux.

Answer 1

"forefinger in the direction of the lines of force" 100% correct, I took the test.

Answer 2

Correct answer choice is:

B. forefinger in the direction of the lines of force.

Explanation:

The direction of the force - and consequently the transfer of the wire - can be defined by applying Fleming’s left-hand rule.

The forefinger tends to the direction of the magnetic field. The middle finger points in the course of the current. The thumb supplies the direction of force or movement working on the conductor. Fleming's Left Hand Rule is applied in electronic engines which are utilized in coolers, appliances, printers, etc.