1. In your own words, explain the difference between a conductor, an insulator, and a semiconductor. Give an example of each to illustrate your comparison.

2. Explain the difference between charging by induction and charging by contact. Include details of how the charging occurs.

3. If two equal charges are separated by a certain distance, the force of repulsion is F. Given F1, if each charge in F1 is doubled and the distance is cut in half, what is the new value of the force of repulsion, F2? Express your answer in terms of F1.

4. The electrical force on a 2-columb charge is 60 Newton's. What is the magnitude of the electric field at the place where the charge is located?

5. What is an electric field? How do you determine the magnitude and direction of the field at a given point?

6. Two point charges are separated by 6 cm. The attractive force between them is 20 N. Find the force between them when they are separated by 12 cm. (Why can you solve this problem without knowing the magnitudes of the charges?)

7. Explain the difference between electrical potential and electrical potential energy.

8. What is the voltage at the location of a 0.0001-coulomb charge that has an electric potential energy of 0.5 joules?

9. A droplet of ink in an industrial ink-jet printer carries a charge of 1.6 x 10-11 coulombs and is deflected onto paper by a force of 3.2 x 10-4 Newton's. Find the strength of the electric field to produce this force.

10. Cite the three major differences between gravitational and electrical forces.

Solution Summary

Step by step solutions to all the problems are provided.

A. A long straight cable with radius R carries a current uniformly distributed through its circular cross section. Find the self-inductance per unit length of the cable. Hint: find B inside and outside, then find energy everywhere and relate to the self-inductance (per unit length)
B. This cable is now modified to have an ins

Three long, parallel conductors carry currents of I = 2 A. If a = 1 cm, determine the magnitude and direction of the magnetic field at points A, B, and C.
See attached file for full problem description.

What is actually causing the force on the charges of the conducting plate if indeed the current is present when the magnet rotates with the conductor.
If a magnet and adjacent wire move together linearly, a current will not be created since there could not be a current/voltage in the reference frame of the magnet-wire where

1.a) state the assumption associated with the model used to develop the Ideal Gas Law
b) hence or otherwise describe under which physical conditions does the ideal gas law applies
2. Explain why hydrogen which has one electron in its lowest state, should in principle be a metallic conductor in its solid state whereas heli

Hello,
Can you please assist with the induction step for this problem?
3. Prove that
1 + 2 + 2^2 + ... + 2^(n-1) = 2^n - 1
for every n > 1.
5. Prove that for any real number x and for all numbers n > 1,
x^n - 1 = (x - 1)(x^(n-1) + x^(n-2) + ... + x^(n-r) + ... + x + 1).

Suppose the current in the infinite long straight circuit C of Figure 13-5 is given by, see attached, Find the induced emf that will be produced in the rectangular circuit of this same figure. What is that direction of the induced current.

Consider a spherical conductor of radius R. Inside of it are two spherical cavities A and B, with radii a and b, respectively. Each cavity contains a point charge qa and qb, respectively. Find the surface charges for all three surfaces (R, the outer surfaces of the conductor, and the surfaces of the inner cavities A and B) and t

A circuit supplies a 'square' current waveform, with a peak value of 25 mA and transition times of 10 ns, as shown in FIGURE 3. The ground return conductor has a resistance of 50 mΩ and an inductance of 100 nH.
(a) Determine the maximum voltage drop along the ground conductor.
(b) Sketch the waveform of the voltage which wil