Field Theory Answers

In a geology class, you were asked to determine minuscule pieces of rocks are magnetic or not. The problem is you don't have available magnets in the laboratory but a few copper wires and a power supply. How will you identify the magnetic property of rocks?

1. Compare the noise created by the object dropped from 20 cm above and the created after the pie tin repositioned.

2. Compare the noise created by the object dropped from 20 cm above the pie tin and the object dropped from 100 cm above the pie tin.

3. What is the GPE difference (∆U) of the object drop at two different distances from the pie tin?

4. What does the sound created by the object in situation number one indicate?

Given the same problem in #2. Assume that the capacitors are connected in parallel.

a) Find the equivalent capacitance of the circuit.

b) Solve for the charge across each capacitor.

The capacitors have values C1 = 2.0 μF and C2 = 4.0 μF, C3 = 5.0 μF, 

C4 = 7.0 μF and the potential difference across the battery is 9.0 V.

Assume that the capacitors are connected in series.

a) Find the equivalent capacitance of the circuit.

b) Solve for the potential difference across each capacitor.

Determine the electric flux for Gaussian surface that contains 100 trillion electrons.

An average human weights about 650 N.if two such generic humans each carried 1.0 coulomb of excess charge,one positive and one negative. How far apart would they have to be for the electric attraction between them to equal their 650-N weight

 Find the magnitude of an electron's electric field if the field itself is 50cm away from it.

1. Find the magnitude of an electron's electric field if the field itself is 50cm away from it.

2. If another electron is placed at this distance, what would be the magnitude of the electrostatic force between the charged particles?

3. Determine the nature of the force.

Find the magnitude of an electron's electric field if the field itself is 50cm away from it.

An electric dipole consist of point charges q1=+12nC and q2= -12nC placed 10.0 cm apart. Compute the electric potential energy.