Electricity Basics
Does electricity occur in nature?
Yes!
How many types of electrical charges are there?
2
What is the letter that represents the electric constant?
k
Current
What is the name of the law that is represented by the equation I = V/R?
Ohm's Law
The two types of charges: positive and negative come from what particles respectively?
+ : Protons
- : Electrons
What is the smallest amount of a positive and a negative charge? (Two answers)
+ : 1.6 x 10-19 C
- : -1.6 x 10-19 C
What is the electric constant equal to? (Number and units)
9 x 109 Nm2/C2
What makes current flow? AND What slows current down? (Two answers)
Voltage and Resistance
What is the name of the law that states a quantity varies as the inverse square of its distance from its source? Applies to the Force of Electricity equation
Inverse Square Law
When charges pull on each other, it's called
Attraction
How many picometers are in one meter?
10-12
Calculate the force between two charges using Coulomb's Law:
k = 9 x 109 Nm2/C2
q1 = 3 x 10-6 C
q2 = 4 x 10-6 C
d = 1.5 x 10-2 m
4.8 N x 102 N
If the voltage is lower, then the current will be ______ (higher or lower)?
Lower
The lower the resistance, the _____ the current
higher
If a proton and a proton are acting a force upon one another, what would they be doing?
Repulsion
Conductors are materials that have _____ electrons.
Insulators are materials that ____ on tightly to their electrons
loose
hold
Solve for Force of Electricity using Coulomb's Law:
k = 9 x 109 Nm2/C2
q1 = 5 x 10-4 C
q2 = 2 x 10-5 C
d = 4 x 10-2 m
5.63 x 104 N
If 28 C of charge flows past in 4 seconds, what's the current?
7 A
A moving magnet produces a ________ _____?
Electric field
Identify one material that acts as a conductor and one material that acts as an insulator.
Conductor: Metal
Insulator: Rubber or glass
A charge of + 25 x 1012 C and a another charge of -43 x 1012 C are acting upon each other.
How will these forces act on each other?
Attract
Solve for Force of Electricity using Coulomb's Law (round to the second decimal place) AND state whether the particles will attract or repel:
k = 9 x 109 Nm2/C2
q1 = 7 x 10-8 C
q2 = -2 x 10-7 C
d = 0.05 m
5.04 x 10-2 N
Attract
If the current is 4 A and the voltage is 25 V, what's the power?
100 W
There will be no voltage or current induced in a loop of wire if there is no _____ within the loop.
change in the magnetic field