Electricity and Magnetism Answers

A point charge q₁ = + 7.00 x 10^-10 C is at the point x = 0.900m, y= 0.700 m and a second point charge q₂ = -3.00 x 10^-10 C is at the point x = 0.900 m, y= 0m . Calculate the magnitude and direction of the resultant electric field at the origin due to these charges. 

3. How many excess electrons must be added to an isolated spherical conductor 0.100 meters in diameter to produce an electric field of 1800 N/C just outside the surface?

An aluminum disk is held between the poles of a powerful magnet and then pulled out. The person pulling on the disk feels an opposing force due to currents induced through Faraday's law. Explain why the magnitude of the force becomes larger as the disk is pulled faster.

. A battery that has q=10000 C

q=10000 C and ΔV=12 V

ΔV=12 V. Find the total electric potential energy.

What is the magnitude of the force on a charge of +2x10-7 C that is 0.3 m from a charge of -5x10-7 C?

Two charges lie on positive x-axis. Charge A (3.0 x 10^-9 C) is 3.0 cm from the origin and Charge B is 5.0 cm from the origin. (-4.0 x 10^-9 C). What is the total force exerted by these two charges on Charge C (6.0 x 10^-9 C) located at the origin?

A small charge q = 6.0 C is found in a uniform electric field E = 2.6 N/C. Determine the force on the charge

Find the pull on the plunger of an electromagnet when the total flux uniformly distributed is 0.8 mWb. The diameter of the plunger is 5 cm.

A power transformer has a core material with hysteresis coefficient of 120 J/m3. Its volume is 8000 cm3 and the maximum flux density is 1.1 T. Find the hysteresis loss if the frequency of the supply is 50 Hz.

A magnetomotive force is supplied by a current of 1 A through 100 turns. The magnetic circuit consists of a steel core of 1000 permeability, 10 cm long and 4 cm2 area and an air gap 1 cm long. Find the field intensity at the air gap in Oersted