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Electrostatics 1
Electrostatics 2
Circuitry 1
Circuitry 2
Miscillaneous
100
Describe the difference between charging by induction and charging by conduction.
Induction is a charging at a distance and creates and equal/opposite charge ; Conduction is a contact-based charging which splits a charge between two objects.
100
How many electrons are required to produce 1 Coulomb of charge?
1.6x10^19 Electrons
100
What are the defining characteristics of a (a) series circuit? (b) parallel circuit?
(a) Series: current remains constant throughout all components ; (b) Parallel: Voltage remains constant throughout all components.
100
A 20.0cm length of 5.00mm thick wire is connected to a 24.0V cell. This results in an 8.00A current is measured in the circuit. What is the resistivity of the wire?
2.95x10^-4 Ohm-meters
100
This is Kirchhoff's loop rule.
The sum of all the voltages around a loop is equal to zero.
200
An electron is placed in the electric field produced by an alpha particle (The nucleus of Helium) located 1mm away. What will be the electric force effecting the electron?
4.6x10^-22N
200
On your whiteboard draw two positive charges and the field lines emanating from these charges.
NA
200
What does it mean for a resistor to be "ohmic"(to follow Ohm's Law). Include a graph to support your description.
Ohmic means that the current will be proportional to the voltage. Thus the relationship between the voltage and current will show a directly linear graph.
200
A computer monitor runs on 120 Volts, and has an internal resistance of 100 Ohms. How much power would be dissipated by the computer?
140W
200
Draw your response on your whiteboard. Consider image E on your handout. This will be the path of an electron placed at point 5.
What is a curved path toward the negative charge (curved upwards)
300
Two equal charges q are located a distance R from each other resulting in an electrostatic force F acting between the charges. If each charge is doubled and the distance between the charges triples, what will be the new electrostatic force between the charges?
4/9 F ~ 0.4 F
300
Draw your response on your whiteboard. Consider image B on your handout in which an electron is traveling with an initial velocity as shown. This will be the path of the electron.
What is a parabolic path opening upward.
300
Consider image F on your handout. Given R = 4 Ohms, This will be the current in the circuit.
What is 1.4 A
400
Consider image A on your handout. Given the round conductors are initially neutral, this will be the charge in region 5 after a positively charged rod is brought near region 1 (as shown).
what is negative charge.
400
Consider image C on your handout. Given that the net electrostatic force on the central charge is zero, this will be the value of x/y.
What is sqrt (1/2) ~0.71
400
Consider image D on your handout. If the current in the ammeter is 4 A and R = 2 ohms, this must be the voltage from the cell.
What is 48.3 V
400
Consider image E on your handout. Which of the circuits will dissipate the MOST power? What will that power be in terms of V and R?
(2VV)/R
500
Consider image I on your handout. What is the value of R? [Hint: you must use both of Kirchoff’s Laws]
4 Ohms
500
Consider image G on your handout. This circuit contains two batteries and two resistors. Use Kirchoff’s Loop rule to find the current in the circuit.
0.90A