Two insulated wires perpendicular to each other in the same plane carry currents

ID: 1781713 • Letter: T

Question

Two insulated wires perpendicular to each other in the same plane carry currents as shown in (Figure 1) . Assume that I = 11 A and d = 17 cm .

Part B

Find the magnitude of the net magnetic field these wires produce at point Q if the 10 A current is to the right (Current (a) in the figure).

Express your answer in teslas to two significant figures.

BQ=________T

Part C

Find the magnitude of the net magnetic field these wires produce at point P if the 10 A current is to the left (Current (b) in the figure).

Express your answer in teslas to two significant figures.

BP=_____________T

Part D

Find the magnitude of the net magnetic field these wires produce at point Q if the 10 A current is to the left (Current (b) in the figure).

Express your answer in teslas to two significant figures

BQ=___________T

10 A 8.0 8.0 cm

Using B = (mu/2pi) (I/r)

(2 * 10^-7) 11/.17 = 1.29 * 10^-5 T

and

(2 * 10^-7) 10/.08 = 2.50 * 10^-5

Adding for

(b) to get

3.79 * 10^-5 (both fields out of the page)

Subtracting for

(c,d) to get

12.1 * 10^-6 (stronger field into page)

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