Magnetic Effects Of Current Question 43
Question: Two straight horizontal parallel wires are carrying the same current in the same direction, d is the distance between the wires. You are provided with a small freely suspended magnetic needle. At which of the following positions will the orientation of the needle be independent of the magnitude of the current in the wires [NCERT 1983]
Options:
A) At a distance $ d/2 $ from any of the wires
B) At a distance $ d/2 $ from any of the wires in the horizontal plane
C) Anywhere on the circumference of a vertical circle of radius d and centre halfway between the wires
D) At points halfway between the wires in the horizontal plane
Show Answer
Answer:
Correct Answer: D
Solution:
At these points, the resultant field $ =0 $
BETA
