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Two long, straight parallel wires are 10.0 $\mathrm{cm}$ apart and carry 4.00 $\mathrm{A}$ currents in the same direction (Figure 20.68). Find the magnitude and direction of the magnetic field at (a) point $P_{1}$ midway between the wires, (b) point $P_{2}, 25.0 \mathrm{cm}$ to the right of $P_{1}$

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Physics 101 Mechanics

Physics 102 Electricity and Magnetism

Chapter 20

Magnetic Field and Magnetic Force

Motion Along a Straight Line

Motion in 2d or 3d

Electric Charge and Electric Field

Gauss's Law

Current, Resistance, and Electromotive Force

Direct-Current Circuits

Magnetic Field and Magnetic Forces

Sources of Magnetic field

Electromagnetic Induction

Inductance

Cornell University

University of Michigan - Ann Arbor

Hope College

University of Sheffield

Lectures

18:38

In physics, electric flux is a measure of the quantity of electric charge passing through a surface. It is used in the study of electromagnetic radiation. The SI unit of electric flux is the weber (symbol: Wb). The electric flux through a surface is calculated by dividing the electric charge passing through the surface by the area of the surface, and multiplying by the permittivity of free space (the permittivity of vacuum is used in the case of a vacuum). The electric flux through a closed surface is zero, by Gauss's law.

04:28

A magnetic field is a mathematical description of the magnetic influence of electric currents and magnetic materials. The magnetic field at any given point is specified by both a direction and a magnitude (or strength); as such it is a vector field. The term is used for two distinct but closely related fields denoted by the symbols B and H. The term "magnetic field" is often used to refer to the B field. In a vacuum, B and H are the same, whereas in a material medium, B is a component of H. In the latter case, H is the "magnetic field strength", and B is the "magnetic flux".

05:42

Two long, straight, parall…

10:30

07:57

10:46

Two long, parallel wires c…

02:50

07:02

The two wires shown in Fig…

05:06

Two parallel wires are 5.0…

04:02

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