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Physics: Current and magnetic field strength

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Problem 33.42
A long wire carrying a 5.0 A current perpendicular to the xy-plane intersects the x-axis at . A second, parallel wire carrying a 3.0 A current intersects the x-axis at .
Part A
At what point on the x-axis is the magnetic field zero if the two currents are in the same direction?
ANSWER: = Answer not displayed m

Part B
At what point on the x-axis is the magnetic field zero if the two currents are in opposite directions?
ANSWER: = Answer not displayed m

Problem 33.6
Part A
What is the magnetic field strength at the dot in the figure?
Express your answer using two significant figures.
ANSWER: = 2.8×10−16
Correct

Part B
What is the magnetic field strength at the dot in the figure?
ANSWER:
to the left

to the right

into the page

out of the page

another direction
Answer not displayed

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Solution Summary

The expert examines current and magnetic field strength. Parallel wires carrying current are examined.

Solution Preview

Problem 33.42
A long wire carrying a 5.0 A current perpendicular to the xy-plane intersects the x-axis at . A second, parallel wire carrying a 3.0 A current intersects the x-axis at .
Part A
At what point on the x-axis is the magnetic field zero if the two currents are in the same direction?
ANSWER: = 0.0050 m

Part B
At what point on the x-axis is the magnetic field zero if the two currents are in opposite directions?
ANSWER: = 0.08 m

Work:
Notation:
wire #1 = the one on the left and the corresponding field is B1.
wire #2 = the one on the right and the corresponding field is B2.
Using the right hand rule, we can determine the direction of the magnetic field due to the wires in different regions. There are three regions to ...

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