Electric Charge and Static Electricity Guided Reading
and Study
Q. What are three ways that static electricity can be
transferred?
A. Charging by friction, charging by conduction, and
charging by induction
Q. Why does an object become charged?
A.
An object becomes charged when electrons
are transferred from one location to another
1.
positive
2.
negative
3.
a, c
4.
Protons and electrons have different types of
charges.
5.
electricity
6.
The attraction of repulsion between electric
charges
7.
electric field
8.
direction
9.
false
10.
combine
11.
a
12.
It can become charged by gaining or losing
electrons.
13.
static electricity
14.
negative
Electric Current
Guided Reading and Study
1.
The continuous flow of electric charges
through a material
2.
a, b, d
3.
true
4.
Charges must flow continuously from one
place to another.
5.
electric circuit
6.
false
7.
a. Conductors, b. Copper, silver, iron,
aluminum, c. Insulators, d. Rubber, glass, sand,
plastic, wood
8.
In a conductor, atoms contain electrons that
are loosely bound.
9.
The inner wire is the conductor, and the
rubber coating is the insulator.
10.
Potential energy
11.
true
12.
b, d
13.
volt (V)
14.
false
15.
A device that creates a potential difference in
an electric circuit
16.
b, c
17.
The measure of how difficult it is for charges
to flow through a material
18.
true
19.
20.
a. The material from which the wire is made,
b. Length, c. Diameter, d. Temperature of the wire
21.
a, d
22.
false
Electric Circuits
Guided Reading and Study
a.
Unbroken path through which current flows
b.
Several paths for current to take
1.
George Ohm
2.
the resistance
3.
Resistance = Voltage /Current
4.
V = IR
5.
6.
120 V
7.
true
8.
a. Circuits have devices that are run by
electrical energy.
b.
A circuit has a source of electrical energy.
c.
Electric circuits are connected by conducting
wires.
9.
Such devices resist the flow of electric
current.
10.
a, c, d
11.
To control the current in the circuit
12.
a. Energy Source
b.
Resistor
c.
Wire
d.
Switch
13.
An electric circuit in which all parts of the
circuit are connected one after another along one
path
14.
one
15.
The burned out bulb acts as a break in the
circuit, and none of the other bulbs will light.
16.
Adding more bulbs increases the resistance,
and as resistance increases current decreases. The
result of less current is that the bulbs become
dimmer.
17.
You would connect it in series.
18.
parallel circuit
19.
The other bulbs will remain lit because there
is still current in the other branches.
20.
b, c
21.
true
22.
a. Series circuit
b.
Parallel circuit
23.
You would connect it in parallel.
24.
With a series circuit, all electrical devices in
the home would go off every time a switch was
turned off or a light bulb burned out.
25.
parallel circuits
26.
120 V
Electric Power
Guided Reading and Study
Question What is electric power?
Answer Electric power is the rate at which electric
energy is transformed into another form of energy.
Question What does paying for electrical energy
depend on?
Answer It depends on the power of the electrical
devices and the amount of time they are used.
1.
An electrical appliance transforms electrical
energy into another form.
2.
true
3.
power
4.
The watt (W)
5.
a, c, d
6.
a. voltage, b. current
7.
voltage
8.
P = VI
9.
12 W
10.
a. power, b. time
11.
Energy = Power x Time, or E = P T
12.
kilowatts (kW)
13.
kilowatt-hour (kWh)