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
"When distance increases, force decreases" is true of both electrical force and ___ force.
Gravitational
According to Coulomb's law, when charge increases, force ___.
Increases
___ 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
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 solid crystal material that is able to conduct electricity digital
Semiconductor
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
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
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
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
