29. Sources of Magnetic Field

Magnetic Force Between Parallel Currents

Magnetism (11 of 13) Magnetic Force Due to Parallel Wires, Current Opposite Directions

Four, long, parallel power lines each carry 100-A currents. A cross-sectional diagram of these lines is a square, 20.0 cm on each side. For each of the three cases shown in Fig. E28.25<img src="https://lightcat-files.s3.amazonaws.com/problem_images/ef36732b7d67b8fb-1672416747859.jpg" alt="" />, calculate the magnetic field at the center of the square.

Two very long wires of unknown lengths are a parallel distance of 2 m from each other. If both wires have 3 A of current flowing through them in the same direction, what must the force per unit length on each wire be?&nbsp;BONUS:Is the mutual force between the wires attractive or repulsive?

Magnetic Force Between Two Parallel Current Carrying Wires, Physics & Electromagnetism

Two long parallel wires lie in the x-y plane, and each carry <math display='inline'><mrow><mn>5.0</mn><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">A</mi></mrow></math> currents in opposite directions. Wire 1 lies along the <math display='inline'><mrow><mi>y</mi><mo>=</mo><mn>3.0</mn><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">cm</mi></mrow></math> line and carries a current in the negative x direction; wire 2 lies along the <math display='inline'><mrow><mi>y</mi><mo>=</mo><mn>0</mn></mrow></math> line and carries a current in the positive x direction. What is the direction of the magnetic field at the point (<math display='inline'><mrow><mn>0</mn><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">cm</mi></mrow></math>, <math display='inline'><mrow><mn>0</mn><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">cm</mi></mrow></math>, <math display='inline'><mrow><mn>1.5</mn><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">cm</mi></mrow></math>)?

Magnetism (10 of 13) Magnetic Force Due to Parallel Wires, Current Same Direction

Anderson Video - Magnetic Force Between Parallel Wires

. Two long, parallel wires are separated by a distance of 0.400 m (Fig. E28.29). The currents I1 and I2 have the directions shown. (b) Each current is doubled, so that I1 becomes 10.0 A and I2 becomes 4.00 A. Now what is the magnitude of the force that each wire exerts on a 1.20-m length of the other?

. Two long, parallel wires are separated by a distance of 0.400 m (Fig. E28.29). The currents I1 and I2 have the directions shown. (a) Calculate the magnitude of the force exerted by each wire on a 1.20-m length of the other. Is the force attractive or repulsive?

Two long parallel wires lie in the x-y plane, and each carry <math display='inline'><mrow><mn>5.0</mn><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">A</mi></mrow></math> currents in opposite directions. Wire 1 lies along the <math display='inline'><mrow><mi>y</mi><mo>=</mo><mn>3.0</mn><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">cm</mi></mrow></math> line and carries a current in the positive x direction; wire 2 lies along the y = 0<math display='inline'><mrow><mi>y</mi><mo>=</mo><mn>0</mn></mrow></math> line and carries a current in the negative x direction. What is the magnitude of the magnetic field at the point (<math display='inline'><mrow><mn>0</mn><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">cm</mi></mrow></math>, <math display='inline'><mrow><mn>1.5</mn><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">cm</mi></mrow></math>, <math display='inline'><mrow><mn>0</mn><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">cm</mi></mrow></math>)?

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