Recent content by freddy13

Homework Statement A long solenoid of radius R, length L (which is much longer than R), number of windings N, has a current I that is changing in time at a rate (dI/dt). What is the magnitude of the electric eld a distance R=2 from the axis of the solenoid? Homework Equations...

Thank you very much! Gotta watch those number entering errors!

Which, multiplied by the 24 V would give me 156.226 micro C, or 1.56*10^-4 C...is that right?

I got 6.509 microF this time, does that sound correct?

Homework Statement A number 12 copper wire has a diameter of 2.053mm. Calculate the resistance of a 31m long piece of such wire. Use rho=1.72x10-8 Ohm-m for the resistivity of copper. Homework Equations This is the part that I am unsure of, all of my equations for resistivity do not...

This one to be more exact!

It is the second one! Sorry for the miscommunication!

Homework Statement Three capacitors having capacitance C1 = 3.00 microF, C2 = 8.50 microF and C3 = 15.0 microF are connected to a 24.0 V battery as shown. Calculate the charge on C3. Homework Equations $$ C_{eq}= \left ( \frac{1}{C_1+C_2} + \frac{1}{C_3}\right )^{-1}$$ Q = CΔV The...

I have two questions! General: A uniform circular ring of charge Q and radius R is located in the x-y plane, centered on the origin as shown in the figure. #1 What is the magnitude of the electric field, E, at point P located a distance z above the center ring? I came up with kQ/(R^2 +...

Yeah I copied the problem exactly! It has to be something with the units that I am missing, that seems to be the only possibility!

Homework Statement A thin, cylindrical copper shell of diameter ds = 2 cm has along its axis a thin metal wire of diameter dw = 7.50 x 10-03 cm. (as shown in the diagram below.) The wire and the shell carry equal and opposite charges of 6.35 x 10-09 C/cm, distributed uniformly. What is the...

Homework Statement A spherical rain drop carries a charge of 5×10-6 C and has a potential of 8.800×10-8 V at the surface. Find the radius of the drop. Homework Equations V = (kQ)/r The Attempt at a Solution I simply moved V and r to their respective spots and plugged in my...