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3 years ago

15

An unusual lightning strike has a vertical portion with a current of −400 A downwards. The Earth's magnetic field at that locati

on is parallel to the ground and has a magnitude of 30 μT. Calculate, in N, the force exerted by the Earth's magnetic field on the 25-m-long current.

1 answer:

Xelga [282]3 years ago

4 0

Answer:

0.3 N

Explanation:

i = 400 A

B = 30 x 10^-6 T

L = 25 m

Force due the current carrying conductor placed in a magnetic field

F = B i L SinФ

where, Ф be the angle between length vector and magnetic field vector

F = 30 x 10^-6 x 400 x 25 = 0.3 N

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