At some location, Earth\'s magnetic field is B_earth = 0.52 gases and points Nor

Question

At some location, Earth's magnetic field is B_earth = 0.52 gases and points North, at 55.0 degree below horizontal as shown. A power line is carrying a current of 75 A due north. a) Find the magnitude of the magnetic force on 25-m long of the power line. b) Give direction of the magnetic force using RHR A long straight wire carries a current to the right as shown. Its magnitude field at point P is directed shown. a. uparrow b. downarrow c. leftarrow d. rightarrow e. f. g. B = 0. Two long straight wires carry equal currents as shown. The magnetic bold produced at point P halfway between the wires in directed a. uparrow b. downarrow c. leftarrow d. rightarrow e. f. g. B = 0. A long straight wire carries a current out of the page as shown. The magnetic field produced at point P is: a. uparrow b. downarrow c. leftarrow d. rightarrow e. f. g. B = 0. A bar magnet is placed near a wire carrying a current as shown. The direction of the magnetic force on the wire is a. uparrow b. downarrow c. leftarrow d. rightarrow e. f. g. B = 0.

Explanation / Answer

1) a) Magnetic force is given by F = i L x B

= 75*25*0.52e-4* sin 55 degree

= 0.0799 N answer

B) into the page.

The other questions can be answered simply using RHR rule and above formula.

2) option f

3) option e

4) option a

5) option c

6)option e

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