29. Sources of Magnetic Field

Magnetic Field Produced by Moving Charges

Calculating the Magnetic Field Due to a Moving Point Charge

The current in a wire varies with time according to the relationship I = 55 A - (0.65 A/s^2)t^2. (b) What constant current would transport the same charge in the same time interval?

The circuit shown in Fig. E25.33<img src="https://lightcat-files.s3.amazonaws.com/problem_images/80114bbf59e96c73-1674062429404.jpg" alt="" /> contains two batteries, each with an emf and an internal resistance, and two resistors. Find (a) the current in the circuit (magnitude and direction)

The circuit shown in Fig. E25.33 <img src="https://lightcat-files.s3.amazonaws.com/problem_images/c253b883461e6474-1674062752378.jpg" alt="" />contains two batteries, each with an emf and an internal resistance, and two resistors. Find (b) the terminal voltage Vab of the 16.0-V battery

What is the force on an electron with velocity <math display='inline'><mrow><mover accent='true'><mi>v</mi><mo stretchy='true'>&#x21C0;</mo></mover><mo>=</mo><mo stretchy='false'>(</mo><mn>3.0</mn><mo>&#x00D7;</mo><msup><mn>10</mn><mn>5</mn></msup><mfrac><mi mathvariant="italic" class="MathML-Unit">m</mi><mi mathvariant="italic" class="MathML-Unit">s</mi></mfrac><mo stretchy='false'>)</mo><mover accent='true'><mi>i</mi><mo stretchy='true'>&#x005E;</mo></mover><mo>+</mo><mo stretchy='false'>(</mo><mn>4.0</mn><mo>&#x00D7;</mo><msup><mn>10</mn><mn>5</mn></msup><mfrac><mi mathvariant="italic" class="MathML-Unit">m</mi><mi mathvariant="italic" class="MathML-Unit">s</mi></mfrac><mo stretchy='false'>)</mo><mover accent='true'><mi>k</mi><mo stretchy='true'>&#x005E;</mo></mover></mrow></math> in a region of space with magnetic field <math display='inline'><mrow><mover accent='true'><mi>B</mi><mo stretchy='true'>&#x21C0;</mo></mover><mo>=</mo><mo stretchy='false'>(</mo><mn>2.4</mn><mo>&#x00D7;</mo><msup><mn>10</mn><mrow><mo>&#x2212;</mo><mn>4</mn></mrow></msup><mi mathvariant="italic" class="MathML-Unit">T</mi><mo stretchy='false'>)</mo><mover accent='true'><mi>i</mi><mo stretchy='true'>&#x005E;</mo></mover></mrow></math>?

An idealized ammeter is connected to a battery as shown in Fig. E25.28<img src="https://lightcat-files.s3.amazonaws.com/problem_images/bf6758f620008e41-1674058622904.jpg" alt="" />. Find (a) the reading of the ammeter.

As a proton passes the origin, its velocity is <math display='inline'><mrow><mn>3.0</mn><mo>&#x00D7;</mo><msup><mn>10</mn><mn>5</mn></msup><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">m</mi><mo>/</mo><mi mathvariant="normal" class="MathML-Unit">s</mi></mrow></math> in the positive x direction. What is the direction of the magnetic field at the point (<math display='inline'><mrow><mn>12.0</mn><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">cm</mi></mrow></math>, <math display='inline'><mrow><mn>5.0</mn><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">cm</mi></mrow></math>, <math display='inline'><mrow><mn>0.0</mn><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">cm</mi></mrow></math>)?

An idealized ammeter is connected to a battery as shown in Fig. E25.28<img src="https://lightcat-files.s3.amazonaws.com/problem_images/6d9de05651c3203c-1674059178642.jpg" alt="" />. Find (c) the terminal voltage of the battery.

Magnetic Field of a Moving Charge, Proton, Right Hand Rule - Physics & Electromagnetism

An idealized ammeter is connected to a battery as shown in Fig. E25.28<img src="https://lightcat-files.s3.amazonaws.com/problem_images/9a52e46cd6bd8905-1674058954964.jpg" alt="" />. Find (b) the current through the 4.00-Ω resistor.

A charged particle moving in a magnetic field has a force to the top of the page when it is moving toward the right and the field is into the page. Is this particle positive, negative or neutral?

The current in a wire varies with time according to the relationship I = 55 A - (0.65 A/s^2)t^2 . (a) How many coulombs of charge pass a cross section of the wire in the time interval between t = 0 and t = 8.0 s? (b) What constant current would transport the same charge in the same time interval?

As a proton passes the origin, its velocity is <math display='inline'><mrow><mn>3.0</mn><mo>&#x00D7;</mo><msup><mn>10</mn><mn>5</mn></msup><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">m</mi><mo>/</mo><mi mathvariant="normal" class="MathML-Unit">s</mi></mrow></math>in the positive x direction. What is the magnitude of the magnetic field at the point (<math display='inline'><mrow><mn>12.0</mn><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">cm</mi></mrow></math>, <math display='inline'><mrow><mn>5.0</mn><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">cm</mi></mrow></math>, <math display='inline'><mrow><mn>0.0</mn><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">cm</mi></mrow></math>)?

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