# BRENNAN CHAPTER 13 STUDY GUIDE ANSWERS

Electric circuit
Any complete path through which electricity travels

Electric Current
The flow of electric charge

Conductor
A material that easily carries electrical current

Insulator
Opposite of conductor

Switch
Turns electricity on and off

Voltage
Measure of electric potential energy

Closed Circuit
Circuit w/ complete path of current flow

Open Circuit
No current can flow

Ohm’s Law
More resistance less current

Amps
A unit of electric current equal to a flow of one coulomb per second

Multimeter
Instrument used to measure, current, voltage, and resistance

Potentiometer
Variable resistor

Circuit Diagrams
Drawing of an electric circuit

Resistor
Electrical device w/ a fixed resistance

Resistance
The measure of an objects ability to conduct electrical current measure of ohms

The difference between open and closed circuits?
Closed circuit- current can flow

Open circuit- No current can flow

How is energy supplied in a circuit?
Energy is supplied in the wires

What are the signs for a circuit diagram?
What are the signs for a circuit diagram?

To measure current and voltage in a diagram-
you use a multimeter

What is the function of a battery in a circuit?
This brings power to an electrical circuit

What is the unit for current?
Amps (A)

What is the unit for voltage?
Volts (V)

What is the unit for resistance?
Ohms (insert ohm sign here)

How do you apply Ohm’s Law
I=V/R (current) = (voltage) / (resistance)

What is the relationship between current and voltage?
The relationship between voltage, current, and resistance is described by Ohm’s law.

What is the relationship between current and resistance?
Defines the relationship between the voltage, current, and resistance in an electric circuit: I = V/R

Can you classify conductors and insulators?
Conductors= metal
Insulators= anything else

Describe resistors
high resistance= harder for electricity to get through
low resistance= easier for electricity to get through

A simple explanation of how resistors reduce a flow of electricity and the different jobs they do in electronic circuits

What is the electrical flow in a circuit?
There is different changes in energy in different spots in a circuit.