29. Sources of Magnetic Field

Magnetic Force Between Parallel Currents

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

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.

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

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>)?

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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