IPC Unit 10 Practice Test
An electric ___ is a region that surrounds a charged particle or object and can exert a force on other charged particles or objects.
Field
a device that transforms mechanical energy into electrical energy with the help of electromagnetic induction
Generator
Electric ___ is the rate at which electrical energy is converted into a different form of energy.
Power
___ is the tendency for material to restrict or disrupt the flow of electrons.
Resistance
a circuit that contains only one loop for an electric current to flow through
Series Circuit
The difference in charge between two points is called ___.
Voltage
a solid crystal material that is able to conduct electricity digital
Semiconductor
According to Coulomb's law, when distance increases, force ___.
Decreases
This picture shows a(n) _____________ signal.(rectangular)
Digital
a signal that is formed when an electric current is repeatedly switched off and on
Digital
a device that converts electrical energy into mechanical energy
Electric motor
a type of substance that promotes the movement of electricity from the cathode to the anode
Electrolyte
the use of electric currents to make a magnet
Electromagnetism
What happens to signals when using a cell phone?
Signals are repeatedly converted from analog to digital and from digital to analog.
a thin, coiled wire that is tightly wrapped around a metallic core
Solenoid
electricity created when there is an excess of electric charge on the surface of an object
Static
According to Coulomb's law, when charge increases, force ___.
Increases
A subwoofer needs 110 V to push a current of 6.5 A through its coil. What is the resistance?
16.9Ω
In ___, television was invented.
1927
When Ben studies for a test, he uses a light that runs on 120 V and has 0.5 A of current running through it. How powerful is the lamp?
60 W
Which of these drawings of magnetic domains in a paper clip show a magnetized paper clip that is NOT magnetized?
A
A(n) ________ current is used in homes, can travel long distances, and was invented by Nikola Tesla.
AC
An electric current that reverses direction in a regular pattern is called ___.
AC
A(n) ___ signal is formed when there is a continuous change of voltage in a circuit.
Analog
This picture shows a(n) ____________ signal.(curved)
Analog
Where is the magnetic force stronger?
B
a closed path that an electric current will follow
Circuit
a conducting metal ring in a motor or generator that is split
Commutator
Because you can control their ___, semiconductors make the perfect material of choice when designing electronic devices.
Conductivity
the flow of electric charge in a single direction
Current
A(n) ________ current is used in flashlights and batteries, and was invented by Thomas Edison.
DC
An electric current that flows in a single direction is called ___.
DC
___ discovered static electricity by rubbing materials against amber.
Miletus of Thales
In a(n) ___________ circuit, if one electric device goes out, the others will still work.
Parallel
a circuit that contains two or more branches to allow electric currents to flow through
Parallel Circuit
If a material has its magnetic domains all pointing in the same direction at all times, it is a(n) ____________ magnet.
Permanent
How can you decrease electric current with electromagnetic induction?
Decrease the speed at which the magnet moves.
the process that occurs when an electric current is generated by a changing magnetic field
Electromagnetic Induction
A(n) ___ signal is an electric current used to encode information.
Electronic
"When distance increases, force decreases" is true of both electrical force and ___ force.
Gravitational
