1. Conductors, by definition, can carry charge. If it is not located within the
ID: 306331 • Letter: 1
Question
1. Conductors, by definition, can carry charge. If it is not located within the volume, then where is it located? 2. Using Kirchoff's rules, analyze the circuit below. Assume the resistive elements obey Ohm's law 100 ohms 5 V 200 ohms 9 V 300 ohms what is the magnitude of the current through the 300 ? resistor? In what direction does it point (left or right)? what is the voltage drop across the 300 ? resistor? How much power is dissipated in the 300 ? resistor? A. B. C. Astraight wire of length L carries a current / in the positive z direction in a region where the magnetic field is uniform and specified by B, 38, By-2B, and B, What is the magnitude of the magnetic force on the wire? 3. B, where B is a constant. What value of B should be used in a velocity selector to separate out 2.0-keV protons if E is fixed at 80 kV/m? 4. 5. A circular loop (radius 0.50 m) carries a current of 3.0 A and has unit normal vector of (2i-j+ 2k)/3. What is the x component of the torque on this loop when it is placed in a uniform magnetic field of (2i-ij)T?Explanation / Answer
1.
The excess charge in a conductor must lie only on its outer surface. No charge can be within the volume of the conductor or on the surface of an empty inner cavity. If charge is found to be within the conductor or on an interior surface then Gauss' law fails.
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