Electric Current
What is the SI unit of current
Amps (A)
What is a capacitor?
Stores and dispenses electrical energy throughout the system/circuit (acting as a battery)
What sort of current is used by power plants for long-distance transmission?
Alternating (AC) Current
What type of current powers the E-stim?
A Direct (DC) Current
What law does this formula come from?
V = I x R
Ohm's Law
What is Current?
The flow of electric charge (electrons) through a conductor
What is power and its SI unit?
The rate of transfer of electrical energy within a circuit / Watts
What sort of circuit powers the outlets in your home?
Alternating (AC) Current
What direction(s) does the charge flow in a DC current?
Charge flows in only one direction (not the band)
What does the power of a system indicate?
How much energy a device consumes, heat a resistor or component may produce, and whether the circuit is operating within its limits.
What creates an electric current?
Voltage/Potential Difference
What is the function of a switch in a circuit?
A switch can open(off) or close(on) the circuit depending on its configuration.
What direction(s) does the charge flow in an AC current?
Charge flows continuously reverse
What happens to the polarity in DC currents?
It maintains a constant polarity
How are RC circuits implemented in everyday life? Give an example.
Pacemakers, Strobe lights, Camera Flashes
What's the equation used to solve for Q (Charge)?
Q= I x t
Current x Time
When a wire with a current is heading towards you, what's the magnetic field around the wire?
The magnetic field circles counter-clockwise
What happens to the polarity in AC currents?
It switches over time.
When DC current is graphed, what do you see?
A straight line
What 2 components are required to create an RC circuit?
How many different variable can you solve for using the electric current equation(s)?
Three - Current (I), Time (t), and Charge (Q)
When a wire with a current is moving away from you, what's the magnetic field around the wire?
When AC current is graphed, what distinct shape is created by the wave?
A sine wave
When you plug in your laptop (DC) into an outlet (AC), how does it charge with 2 different types of current?
The AC current inside of the wall is converted to DC current inside of the device (laptop)
What does the Resistor and Capacitor do for the system?
Control voltage rises and falls in the system