the body Will remain at rest or move at constant velocity unless acted by external net force are unbalance force
1 answer:
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Answer: (a) B = 2 x 10⁻⁵T
(b) B = 1.94 x 10⁻⁵T
(c) B = 1.8 x 10⁻⁴T
Explanation: A magnetic field due to a current passing through a straight wire is calculated using the <u>Biot-Savart</u> <u>Law</u>:
where
dL is current length element
is permeability of free space (
T.m/A)
(a) For a infinite straight wire:
B = 2x10⁻⁵T
For an infinite, long and straight wire, magnetic field is 2x10⁻⁵T.
(b) For a finite wire:
B = 1.94x10⁻⁵T
The magnetic field for a finite wire in the same conditionsas infinite wire is 1.94x10⁻⁵T.
(c) For a finite wire at a point distant from the end of the wire:
B = 0.18x10⁻⁵T
At a point at the end, magnetic field is 1.8x10⁻⁴T.