Circuits
Ohm's Law
Coulomb's Law
Electric Field
Capacitance
100
What is the equivalent resistance of this circuit?
4.8 Ohms
100
In a circuit with a 20 V battery , what is the current through a 15 Ohm resistor?
1.33 A
100
What is the force experienced by an electron and a proton, each with charge 1.602e-19, when they're separated by a distance of 15 nm?
1.03e-12 N
100
What is the electric field 2 mm away from an electron.
3.6e-4 N/C
100
What is a capacitor?
A circuit component that stores charge.
200
What is constant at any point in a series circuit?
Current
200
If a washing machine draws 1000 W of power, what current is being supplied by the outlet it's plugged in to? (Assume V of outlet = 120 V)
8.33 A
200
What is the direction of the net force on a positive particle, stationed in the middle of a positive charge (left) and a negative charge (right)?
Right (toward the negative charge)
200
How do we decide the direction that electric field lines will point?
They point the direction a positive test charge would go.
200
What does the dielectric constant, K, signify?
How good of an insulator that dielectric is. Higher K = Higher C
300
What is the equivalent resistance of a circuit with 2 5 Ohm resistors connected in series, but also in parallel with a 10 Ohm resistor?
5 Ohms
300
A circuit has only a 50 V battery and a 25 Ohm resistor. What is the power dissipated in that resistor?
100 W
300
What equation bears a very close resemblance to Coulomb's Law?
The Law of Universal Gravitation
300
By how much does electric field change if our "positive test charge" is moved to twice the distance it was already at?
1/4E
300
A capacitor has a capacitance of 4 micro-Farads, and the plates are each charged to 10 micro-Coulombs. What is the potential difference across the plates?
2.5 V
400
What is the current flowing through Resistor 2 in this circuit?
0.33 A
400
How many 100W bulbs can you connect to a 120V circuit without blowing a 15A fuse?
18
400
According to the picture above, what is the magnitude and direction of the net force on the 10 micro-Coulomb (middle) charge?
1.07e16 N, Left
400
What is the purpose of a dielectric?
To increase capacitance. Allows same charge to be stored at a lower potential.
500
If the switch in the circuit shown is open, what is the total resistance?
40 Ohms
500
Will a parallel circuit or series circuit produce brighter light bulbs?
Parallel
500
Two positive charges are separated by a distance d. How much does the force on each charge change if you were to double the distance to 2d?
1/4F
500
A capacitor is connected to a 20 V battery and has plates with area 5 cm-squared, and these plates are placed 10 mm apart. What is the maximum charge that can be stored on the plates?
8.85e-12 C