Energy stored in a charged capacitor

Calculate the heat generated when a condenser of 100µF capacity and charged to 200 volts is discharged through a 2 ohm resistance.

Determining the amount of water ionized in lighting.

Background: A strong lighting bolt transfers an electric charge of about 28 degree C to earth. The total electrons transferred in the process are 1.7478e20. (Assuming one mole of water has a mass of 17.9g/mol). Question: If each water molecule donates one electron, how much water (in units g) is ionized in the lighting? ...continues

Given a plot of I vs. T of 3 simple circuits. Resistor, an inductor, and a capacitator determine voltage power charge and number of electrons in each case

This is for 3 simple circuits (I am assuming DC circuits). The first has a single resistor. The second has a single inductor. The third has a single capacitator. I need to know how to determine voltage, power, charge, and number of electrons for each case given just a plot of I vs. T for each one. This is for a final exam and I ...continues

Determining what the associated electric field pattern would like given a plot of potential as a function of x.

Given a plot of potential (or an equipotential pattern for x, y) as a function of x (x means position) what would the associated electric pattern would look like? What is the relative magnitude and speed? In summary, if a plot of V(x) is given how do I sketch E(x) and find and describe the motion and do a qualitative evaluation ...continues

One electron atom, KE, PE, BE coulomb forces

Ok this is a simple final exam problem so it wont have much as far as detail. I need to know KE PE and BE for a one electron atom. I need to know the order of magnitude of coulomb forces work in this situation. and the magnetic field at the nucleus. And for the electron, I need to know the electric field created by it. I basicll ...continues

Induced emf on a loop with a light bulb as it moves near a current carrying wire

ok I can't seem to load my picture into this so I have to try and describe this with words. keep in mind this is a final exam problem and will not require much detail. I just need a quick primer that will enable me to do well on this problem in exam circumstances. With that in mind given a loop of wire with a lightbulb on it(the ...continues

Calculating the dielectric constant for glass.

A capacitor with air between its plates is charged to 70 V and then disconnected from the battery. When a piece of glass is placed between the plates, the voltage across the capacitor drops to 43 V. What is the dielectric constant of this glass? (Assume the glass completely fills the space between the plates)

Calculating the change in voltage of an electron.

An electron is moved to a negative plate from an initial position 2.90 mm from the positive plate. What is the change in electrical potential energy due to the movement of this electron? Answer in units of J. Assuming: The force on the electron is 1.8253408e-14 N. The total separation between + and - plates is 5.32mm. Th ...continues

transverse wave pulse mass on a string ( include weight of string)

A mass M hangs vertically on a rope of mass m and length L. a) show that the time for a transverse wave to travel the length of the rope is: t= 2(L/mg)^1/2[(M+m)^1/2-M^1/2] b) show that this reduces to t=2(L/g)^1/2 when M=0 c)show that for m

Electricity Problem

A +30e-6 charge is placed 32 cm form an idnetical +30e-6 charge. How much work would be required to move a +50e-6 test charge from a point midway between them to a point closer to either of the charges?