The law of _______ of charge states that charges are not created or destroyed.
Question 14
14.
11. In a(n)_______ circuit, the different parts of the circuit are on separate branches.
Question 15
15.
The continuous flow of charges through a material is called electric _______ .
Question 16
16.
When the electric field of one object causes a transfer of electrons from one part to another in a second object, without the two objects touching, it is called_______ .
Question 17
17.
The transfer of charge when electrons move from a charged object to another object by direct contact is called _______
Question 18
18.
The resistance of a parallel circuit _______ as you add more branches.
Question 19
19.
Question 20
20.
Question 21
21.
Question 22
22.
Question 23
23.
Question 24
24.
What are the basic features of an electric circuit?
Question 25
25.
How is current related to resistance?
Question 26
26.
Explain why you may produce a static discharge if you touch a metal door knob after walking on a wool carpet.
Question 27
27.
Which circuit illustration represents circuit B?
Question 28
28.
Look at the diagram in question 27. Will removing bulb 1 in circuit B cause bulb 3 to go out? Explain.
The build-up of charges on an object is called
static discharge
static electricity
positive charge
negative charge
What happens when an object is rubbed against another object to charge by friction?
electrons are transferred from one object to another
electrons in one of the objects disappear
electrons in one object suddenly become negatively charged
electrons are created by the friction between the objects
What causes charges to move in a circuit?
voltage
energy
electricity
magnetism
The ampere is a unit of
magnetism
electric current
electric charge
temperature
According to Ohm’s law, resistance is equal to voltage divided by
time
conduction
current
potential
Materials through which charge can flow easily are called
insulators
conductors
resistors
magnets
An example of an insulator is
rubber
copper
silver
iron
Batteries and power plants are examples of
energy sources
energy conduction
energy transformation
energy conservation
Which of the following does not determine the resistance of a wire?
temperature
diameter
length
color
Lisa built an electric circuit. When she added a seond light bulb, the first bulb became dimmer. What type of circuit did Lisa build?
series
parallel
open
short
A complete, unbroken path through which electric charges can flow is a(n)
electric circuit
electrical resistance
magnetic field line
magnetic pole
Your alarm clock has a voltage of 120 V and a resistance of 1200. What current does the alarm clock draw?
.10 A
10.0 A
12.0 A
100 A
As the temperature of most conductors increases, the resistance decreases.
True
False
Electric charges that are different attract each other.
True
False
The electrons in an insulator are tightly bound to their atoms.
True
False
The unit of measure for voltage is the ohm.
True
False
For a constant voltage, increasing the resistance will cause the current to decrease.