A high-voltage power line carries a current of 126A at a location where the Eart

Question

A high-voltage power line carries a current of 126A at a location where the Earth's magnetic field has a magnitude of 0.59 G and points to the north, 72 ?   below the horizontal.

Part C

Find the direction of the magnetic force exerted on a 320m length of wire if the current in the wire flows horizontally toward the south.

Part D

Find the magnitude of the magnetic force exerted on a 320m length of wire if the current in the wire flows horizontally toward the south.

Part A

Find the direction of the magnetic force exerted on a 320m length of wire if the current in the wire flows horizontally toward the east.

Part B

Find the magnitude of the magnetic force exerted on a 320m length of wire if the current in the wire flows horizontally toward the east.

Explanation / Answer

(c) Direction will be the east.
(d) F = iLBSin72 = 126*320*(0.59*10-4)*Sin72= 2.262 N
(A) then the direction will be = 90-72 = 18 degree above the horizontal points to the north.
(B) F = iLBSin90 = 126*320*(0.59*10-4) = 2.379 N

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