Electricity
The charge on a proton is _______
positive
a complete, unbroken path through which electric charges can flow is a(n) _______
electric circuit
a device used to open and close an electric circuit is a(n) _____
Magnetic poles that are alike ______
repel each other
a temporary magnet _____
a. keeps its magnetism for a long time
b. cannot be destroyed
c. easily loses its magnetism
d. has two north poles
c. easily loses its magnetism
Like electric charges ________ each other
repel
battery in which the chemical reaction occurs in a moist paste
dry-cell battery
In a ______ circuit, there is only one path for current to take
series
the region around a magnet where the magnetic force is exerted is known as its ______
magnetic field
the type of current produced by a battery is _____
direct current (DC)
Materials that allow the charges of an electric current to move freely through them are called _______
conductors
an electric current will always follow _____
a. path of least resistance
b. path toward north pole
c. path toward south pole
d. path that leads through insulators
a. path of least resistance
In a(n) _________ circuit, different parts of the circuit are on separate branches.
parallel
the properties and interactions of magnets are referred to as ______
magnetism
Increasing the number of coils in an electromagnet will cause the strength of its magnetic field to ____
increase
Plastic and rubber are examples of ______
insulators
current is equal to voltage difference divided by resistance
Ohm's Law
In a series circuit with 2 bulbs, adding another bulb will _______
a. make the nearest bulb brighter
b. make some of the bulbs dimmer
c. make all the bulbs brighter
d. make al the bulbs dimmer
d. make all the bulbs dimmer
the closer together a magnet's magnetic field lines are, ______
the stronger the magnetic field
an electric current around an iron core produces an ____
magnetic field
Accumulation of excess electrical charges on an object is __________ ____________
static electricity
a push that causes charges to move
voltage difference
A _______ must be replaced after too much current in it causes it to melt
fuse
one part of a freely swinging magnet always points
to Earth's magnetic pole in the Northern Hemisphere
An alternating current consists of charges that _____
move back and forth in a circuit