Magnetic Field

A particle of charge 6e enters a region containing a magnetic field with a velocity of 7.5 X 105 m/s that is perpendicular to the field. There is a force on the particle of 6.84 X 10-13 N. Find the magnetic field T.

Current and Force

Two long, parallel wires are separated by a distance of 0.20 m and carry equal currents. There is a force of attraction per meter of 6.5 X 10-5 N/m between them. Find the magnitude of the currents in A and deterimne if they are parallel or anti parallel.

AC Currents

An AC generator consists of 8 turns of wire, each of an area of 0.090 square meters. The loops rotate in a 0.500 T magnetic field at a constant frequency of 60 Hz. Find The maximum induced emf in Volts.

Magnetic Field

a. Use Ampere's Law to find the general equation for the magnetic field in an infinitely long solenoid. b. Find the magnetic field inside the solenoid.

Current/Voltage

a. What is the output voltage of the step-down transformer? b. What is the inductive reactance? c. What is the capacitance reactance? d. What is the impedance? e. What is the maximum current? f. What is the phase angle between current and voltage? g. What is the maximum voltage across the resistor? h. What is the maxi ...continues

A bar is moving across a open-ended loop with resistance R in a presence of a constant perpendicular magnetic field.

A bar is moving across a open-ended loop with resistance R in a presence of a constant perpendicular magnetic field. a. At what speed should the bar be moved to produce a current of 0.500 A? b. What is the motional emf? c. What is the power dissipated by the resistor? d. What force must be applied to the bar?

Speed Selector

a. The speed of the protons is: The radius of the final path is:

Simple Current and Resistor problem.

Two 6 ohm resistors are placed in parallel with a 9 V battery. What is the current out of the battery? 9 / ( 1 / (1/6 + 1/6) ) = 3A My answer key is telling me my answer is wrong, am I missing something ?

A conducting sphere with potential V is half embedded in a dielectric material. What is the surface charge density?

See attached file for full problem description.

Find all the bound charges and check that they add up to zero.

A dielectric cube of side a, centered at the origin, carries a "frozen-in" polarization P=kr, where k is a constant. Find all the bound charges and check that they add up to zero. (Question is also contained in attachment).