Optics and Waves

Question: 5-4 Sketch Diagram attached.. a) What is the critical angle theta of the interface? b) What is the acceptable angle 'a'. Answer to the problem. (See attached file for full problem description)

Magnetism

two wires, each having a weight per unit length of 10^-4 N/m, are strung parallel, one 0.1 m above the other. If the wires carry the same current, through in opposite directions, how great must the current in each wire be for the magnetic field of the lower conductor to balance the weight of the upper conductor?

Magnetism - 3 Problems

(See attached files for full problem descriptions)

magnetism

(See attached file for full problem description) --- - A loop of 500 turns is placed in a magnetic field that follows the equation: (see attachment). The radius of the loop is 0.75 m. a) What is the relation of the induced emf in that loop? b) What is the induced emf of the loop at 2 sec? c) If the wire has a resistan ...continues

5 Electricity Questions

5 small electricity questions within the file attached.... (See attached file for full problem description)

Basic physics problem

We want to find how many Coulombs of charge are on the electrons in a nickelcoin. Follow this method. A nickel coinhas a mass of about 5.172 g. Each mole(6.02 à— 1023atoms) has a mass of about 57.98 g. Answer in units of atoms. b) Find the number of electrons in the coin.Each nickel atom has 28 electrons/atom. An-swer in un ...continues

Electricity Questions

The questions are in the attachment; i need the workings out and answers to: Question: 1 (b) (c) and (d) Question: 2 Question: 3 Question: 4 --- (See attached file for full problem description)

magnitude of the net electric field

I am looking for the setup of each particale, for the magnitude on point P. in the magnitude setup, how to setup the r^2 in the equation for each Q particale, and how to add them all together.

resistors in parallel

Why do resistors in parallel have the same potential difference ? the book says the reason is that each coulomb of charge passing through the combination delivers the same amount of energy whatever route the charge takes HOW DO I UNDERSTAND THIS AND HOW COME DIFFERENT RESISTANCES DON'T HAVE AN EFFECT TO THIS VOLTAGE

Consider an extended one-dimensional rod of length L and charge Q uniformly distributed. Determine the field from the rod at a point P a distance y from its center perpendicular to the rod.

I'm taking the E&M Class of a first-year Physics with Calculus series. We're working with determining the electric fields of extended objects with integration, and I'm having trouble with properly modeling the problems. If someone could show me a sample solution to one of these, I feel it could really help. Here goes: Consi ...continues