Physics
Grade-10
Easy
Question
The magnetic field at a distance r from a long wire carrying current “I” is B Tesla. The magnetic field at a distance 3r is.
- B
- 3B
Hint:
The magnetic field at a distance r from a long wire carrying current “I” is B Tesla. The magnetic field at a distance of 3r is B/3.
The correct answer is:
B 𝝰 
d = distance from the wire
if d = r
B1 𝝰 
d = 3r
B2 𝝰 
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