Electricity and Magnetism Answers

3. The electric (E) and magnetic (H) field vectors in a medium are given by

𝑬 = 𝒊^ 20𝑐𝑜𝑠(𝜔𝑡 + 𝜋𝑦)𝑉/𝑚 , 𝑯 = 𝒌^ 20 𝑐𝑜𝑠(𝜔𝑡 + 𝜋𝑦)𝐴/𝑚

𝜂

Use Maxwell’s equations to determine η and ω. Assuming that for the medium 𝜀 = 36𝜀𝑜 ,

𝜇 = 𝜇𝑜 .

Two parallel straight wires 10.0 cm apart carry currents in opposite directions (Fig. 20–24). Current I_1=5.0 A is out of the page, and I_2=7.0 A is into the page. Determine the magnitude and direction of the magnetic field halfway between the two wires.

What is the maximum force on an aluminium particle with a +0.1 𝜇𝐶 of charge, which is passing between the poles of a 1.5 𝑇 permanent magnet at a speed of 5 𝑚𝑠−1? In what direction is the force?

Hint: Assume the direction of the magnetic field as preferred. Draw a diagram showing all the relevant vectors in terms of their components. Use the equation for the force on a moving charged particle in a magnetic field.

Consider the configuration shown below, with a negative charge Q0 at position x0=0 and another positive charge Q1 at position 1 along the x-axis. Determine the position At which position x2 could another positive charge charge Q2 be added, such that the total force on Q0 is 0? Give two examples of x2 and corresponding Q2, in terms of x0, x1, Q0 and Q1 (or a subset of these variables). 

If an charged object transfers its charges to another uncharged object will it mass be affected? And how does it transfers its charges?

What happens when a long, straight conductor is moved through a uniform magnetic field at constant velocity? Assume that the conductor moves perpendicular to the field.

A -6 nC particle is moving at 4.0x10^4m/s along the positive z-axis.It passes a region undeflected where there is uniform electric and magnetic fields.The electric field is 5.75 x10^5 N/C along the negative x-axis.What is the magnitude and direction of the magnetic field.

: Please provide the appropriate right answer/ answers from the choices given below and provide an explanation for your choice, as well:

  I.           Which of the following phenomena do not affect the polarization of an electrode?

a.      Diffusion of an reactant to the electrode surface

b.      Diffusion of the product from the electrode surface

c.      Convective limitations in the cell

d.      Standard Cell Potential of the redox couple

e.      Significant Activation barrier to the charge transfer

An electron is placed in an electric potential of 1nV. Determine the velocity of the electron after passing through the potential assuming it was motionless in the beginning

two point particles of charges Q1= 45 and the Q2=85 are found to have a potential energy of 40 what is the distance between the charges