Electricity and Magnetism Answers

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

1-5. Two point charges, q1 = 8 µC and q2 = -5 µC, are separated by a distance r = 0.1 m. What is the magnitude of the electric force? Note: 1 µC = 10-6 C.

the metal plates of capacitor a has an area of 1m^2 separated by a diatance of 0.002m. if a pyrex glass is inserted in between the plates, (a) what will be the change in capacitance? (b) how much energy was stored after insertion if it has a potential difference of 12v?

starting from maxwell's equations derive wave equation for a uniform plane wave travelling in free space.

Consider a soot particle of mass m_soot = 1.0 nanogram (=1.0 x 10^-9 g = 1.0 x 10^-12 kg), which corresponds to a diameter of a few microns. Some number of electrons have been added to give the particle a total charge q_soot, suppose the collector has a total charge of q_collector = 1.0 x 10^-6 C and is small enough to be treated as a point charge at the rim of the smokestack. (a) if the separation between the collector and the soot particle is r = 0.10 m, what is the value of q_soot so that the electric force exerted on the particle is equal to its weight? (b) How many electrons must be added to the soot particle?

A toroid core has N = 1200 turns, length L = 80cm, cross-sectional area A = 60cm2

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current I = 1.5A. Compute B and H. Assume an empty core.

The series combination of 5 F and 20 F capacitors is connected in parallel to 4 F capacitor. What is the energy stored in the combination of capacitors?