ScienceElectricity Flashcards
(36 cards)
What is electric current?
The flow of charged particles; the net rate of flow of electric charge. The charge carriers are particles like electrons or ions.
What is voltage?
How strong a current flows (pressure). The electric potential of a current; how much work it can potentially do. The difference in electric potential between two points in a circuit.
What is an ampere?
The amount of electric current moving per unit time. 1 ampere is 1 coulomb moving past a point per second. The intensity of a current.
What is a coulomb?
A unit of electric charge.
What is resistance?
The amount of opposition to the flow of current in an electrical circuit.
How many electrons are in a coulomb?
6.24 x 10^18 electrons, or 6.24 quintillion.
What is represented by the omega symbol, 𝝮?
Resistance.
Which electrical term is represented by an I, for ‘intensity’?
Current, measured in amperes.
Which electrical term is analogous to water pressure?
Voltage.
Which electrical term tells you how much work an electrical current is able to perform?
Voltage.
What are we talking about when we discuss something’s ‘potential’?
Its ability to do work.
What is the name of the negative prong (electrode) of a battery?
Anode.
What is the name of the positive prong (electrode) of a battery?
Cathode.
Which electrode is analogous to a water tower, putting POSITIVE PRESSURE on a circuit?
Anode.
Which electrode is analogous to a syringe, putting NEGATIVE PRESSURE on a circuit?
Cathode.
How do we describe the direction of electrical current?
Conventionally, we describe the direction of electrical flow as the direction of positive charge, opposite the actual electron flow.
What is Ohm’s law?
Ohm’s law states electric current (I) is directly proportional to voltage (V) and inversely proportional to resistance (𝝮). I = V/𝝮
If you have three batteries, each with 1.5 volts, how do you arrange them to get 4.5 volts?
In series (lined up one after the other), not in parallel.
What is electric current?
The flow of charged particles; the net rate of flow of electric charge. The charge carriers are particles like electrons or ions.
What is voltage?
How strong a current flows (pressure). The electric potential of a current; how much work it can potentially do. The difference in electric potential between two points in a circuit.
What is an ampere?
The amount of electric current moving per unit time. 1 ampere is 1 coulomb moving past a point per second. The intensity of a current.
What is a coulomb?
A unit of electric charge.
What is resistance?
The amount of opposition to the flow of current in an electrical circuit.
How many electrons are in a coulomb?
6.24 x 10^18 electrons, or 6.24 quintillion.
