Recent content by nns91

I mean X(L)^2 not XL^2

Homework Statement A resistance R and a 1.4 H inductance are in series across a 60 Hz AC voltage. The voltage across the resistor is 30V and the voltage across the inductor is 40V. (a). What is the resistance R ? (b). What is the AC input voltage ? Homework Equations \xi=I*Z The Attempt at...

Do I have to calculate the initial charge of each capacitor and average them to 0.5microC and then calculate the voltage from there ?

Homework Statement A 100pF and a 400pF capacitor are both charged to 2kV. They are then disconnected from the voltage source and are connected together, positive plate to negative plate. (a). Find the resulting potential difference across each capacitor (b). Find the energy lost when the...

Homework Statement 1. A portion of an infinitely long, concentric cable. The inner conductor carries a charge of 6 nC/m; the outer conductor is uncharged. The radius of the inner conductor is 1.5 cm, of the outer conductor is 6.5cm and of the inner surface of the outer conductor is 4.5 cm...

So if I assume that sphere 2 is uncharged initially, then I should make its potential equal to 12kV right ? since 2 spheres are equipotential. Oh, if charged is conserve then kq1/R1= 20kV = kq1/R1= 12kV ?

Homework Statement A spherical potential conductor of radius R1 is charged to 20kV. When it is connected by a long, fine wire to a second sphere faraway. its potential drops to 12kV. What is the radius of the second sphere. Homework Equations V=kq/r The Attempt at a Solution So...

Homework Statement 1. A positive charge of magnitude 2 microC is at the origin. (b)How much work must be done by an outside agent to bring a 3 microC charge from infinity to r=4, assuming that the 2 microC charge is held fixed at the origin ? (c) How much work must be done by an outside...

so do I use this 150 degree to calculate the component of the Electric field due to the 2nd plane ? The electric field due to the first plane is just in y direction (upward), right ?

Will it be 150 degree ?

Homework Statement AN infinite plane in the xz plane carries a uniform surface charge density 65 nC/m^2. A second infinite plane carrying a uniform charge density 45 nC/m^2 intersect the xz plane at the z axis and makes an angle of 30 degree with the xz plane. Find the electric field in the...

Homework Statement An electron (charge -e, mass m) and a positron (charge +e, mass m) revolve around their common center of mass under the influence of their attractive coulomb force. Find the speed of each particle v in terms of e, m, k and their separation r ? Homework Equations F=...

Homework Statement Expalin how a positively charged insulating rod can be used to give a metal sphere a positive charge. Cam the same rod be used to simultaneously give one sphere a psotive charge and another sphere a negative charge without the rod having to be recharged ?? Homework...

Thank you

Thanks. Yeah, I am new too this since it's only my 2nd week of learning. Also a question, when I am asked for the parametric equations for the line that is normal to the tangent plane at a point, do I just take D1f, D2f, D3f and calculate the value at the point then plug in parametric equation...