Electrostatics
Coulomb's Law
Ohm's Law
Circuits
More Circuits
100
What kind of charges do protons, electrons, and neutrons have?
Positive, negative, and neutral
100
What is the formula we use to calculate electric force between two charged objects (Coulomb’s Law)?
F = kq1q2 / r^2
100
Ohm’s Law involves which three values/variables?
V = voltage (volts) I = current (amps) R = resistance (ohms)
100
What is the difference between a series circuit and a parallel circuit?
There is only one pathway for electricity to flow in a series circuit, as opposed to many pathways in a parallel circuit
100
In a parallel circuit, what happens to the current when you add more resistors?
It increases
200
What is the tool that can be used to identify charges on objects?
An electroscope
200
What is the value of “k” in Coulomb’s Law?
9 x 10^9 Nm^2/C^2
200
Ohm’s Law can be written three different ways. Name one.
I = V/R or V = IR or R = V/I
200
What is the total resistance for a 130 ohm, 75 ohm, 20 ohm, and 8 ohm resistor connected in series?
233 ohms
200
A circuit has a 6 V battery with a 5, 6, 7, 8, and 9 ohm resistor all connected in series. What is the current in this circuit?
0.17 amps
300
What do we call materials that easily distribute electric charge over their surface areas?
Conductors
300
If the distance between two charged objects is increased by 5 times, then the electric force between them would __________ by _____ times
decrease by 25 times
300
With constant potential difference (voltage), adding resistors to a series circuit would do what to the current?
Decrease it
300
What is the total resistance for a 125 ohm, 60 ohm, 30 ohm, and 5 ohm resistor connected in parallel?
3.88 ohms
300
A circuit has a 100 V battery with three 300 ohm resistors connected in parallel. What is the current in this circuit?
1 amp
400
What is one example of an insulator?
Rubber, glass, paper, plastic, Styrofoam, air, wood, etc.
400
q1 = 3.5 x 10^-5 C, q2 = 6.1 x 10^-5 C, r = 2.2 m The electric force between these two particles is…
3.97 N
400
What would the current in a circuit be if it had a 12 V battery and four 6 ohm resistors connected in series?
0.5 amps
400
V = 20 volts, R1 = 5 ohms, R2 = 10 ohms If these resistors are connected in series, what is the current flowing in this circuit?
1.33 amps
400
Voltmeters in a circuit must be connected in __________
parallel
500
When a plastic rod is rubbed with a piece of cloth, the rod becomes _______________ charged.
negatively
500
q1 = 4.3 µC, q2 = 7.9 µC, r = 12 cm The electric force between these two particles is…
21.23 N
500
What is the total resistance of a circuit if it has a 9 V battery and 81 amps of current flowing through it?
0.11 ohms
500
V = 12 volts, R1 = 4 ohms, R2 = 6 ohms If these resistors are connected in parallel, what is the current flowing in this circuit?
5 amps
500
V = 9 volts, I = 2.5 amps, R1 = 9 ohms, R2 = 9 ohms, R3 = ? If these are the components of a parallel circuit, what is the value of R3?
18 ohms
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