1
electric charges that are different ______
attract
A device used to open and close an electric circuit is a energy source. T or F?
False, A SWITCH
electric charges that are like ____________
repel
_____________ is the tendency for a material to oppose the flow of electrons, changing electrical energy into thermal and light energy
Resistance
the build up of charges on an object is known as __________
static electricity
which type of energy is associated with ELECTRIC CURRENTS?
electrical energy
magnetic energy
geothermal energyelectrical energy
the closer together a magnetic fields lines are, the weaker the magnetic field. T or F
False, STRONGER (closer together)
a complete, unbroken path where electric charges can flow is a
a. electrical resistance
b.magnetic pole
c. magnetic field line
d. electric circuit
d. electric circuit
a _______ must be replaced after too much current causes it to melt
Fuse
an electric current will always flow throygh
a. the path of least resistance or b. the path that leads through insulators
PATH OF LEAST RESISTANCE
In this type of circuit, diffent parts of the circuit are on separate branches.
Parallel
A temporary magnet easily looses its __________.
magnetism or has 2 N poles
magnetism
in this circuit, there is only 1 path for current to take.
series
An example of an insulator is ______
a. copper
n. silver
c. rubber
d. iron
c. rubber
increasing the # of loops in a solenoid will cause the strength of the magnetic field to _____.
increase
this magnet can be turned on and off
Electromagnet
An _____________ current consists of charges that move back and forth in a current.
Alternating
What can be used to open or close electric..
Circuit
Electrical energy
the magnetic force around a magnet is called ...
Magnetic Field
The type of current that is produced by a battery is ______________ current.
direct
Where on a parallel circuit would 3 bulbs be?
On the same branch, there is only one path for the current to take or current from each bulb has its own path?
current has its own path
What causes charges to move in a circuit?
a. voltage or b. magnetism
Voltage
In a series circuit with 3 bulbs assing another will mske some of the other bulbs....
a. brighter or b. dimmer?
Dimmer
Earths magnetism is related to the types of molten material within Earth's ________.
Core