How does adding a resistor to an electric circuit affect the current?(1 point)
Responses
The resistor decreases the current by transforming electrical energy into different types of energy.
The resistor decreases the current by transforming electrical energy into different types of energy.
The resistor decreases the current by decreasing the amount of electric charge.
The resistor decreases the current by decreasing the amount of electric charge.
The resistor increases the current by transforming light energy or heat into electrical energy.
The resistor increases the current by transforming light energy or heat into electrical energy.
The resistor increases the current by increasing the amount of electric charge.
The resistor decreases the current by decreasing the amount of electric charge.
Which energy transformation happens when a toaster is plugged in to an outlet in the wall and used to make toast?(1 point)
Responses
Electrical energy from the outlet is converted to heat and light energy for the toaster.
Electrical energy from the outlet is converted to heat and light energy for the toaster.
Electrical energy from the outlet is converted completely to chemical energy in the toast.
Electrical energy from the outlet is converted completely to chemical energy in the toast.
Electrical energy from the outlet is converted to heat and chemical energy in the toast.
Electrical energy from the outlet is converted to heat and chemical energy in the toast.
Electrical energy from the outlet is converted completely to heat energy for the toaster.
Electrical energy from the outlet is converted completely to heat energy for the toaster.
Electrical energy from the outlet is converted to heat and light energy for the toaster.
answer a b c or d
Solar cells are used to power a person’s house. Which statement about the process is correct?(1 point)
Responses
Energy from the sun will equal the energy needs of the house because energy is not created or destroyed.
Energy from the sun will equal the energy needs of the house because energy is not created or destroyed.
Energy from the sun might be greater than the energy needs of the house because some energy is destroyed in the process.
Energy from the sun might be greater than the energy needs of the house because some energy is destroyed in the process.
Energy from the sun might be less than the energy needs of the house, but solar cells make up for this difference.
Energy from the sun might be less than the energy needs of the house, but solar cells make up for this difference.
Energy from the sun might be greater than the energy needs of the house, so some energy will be stored and/or wasted.
Energy from the sun might be less than the energy needs of the house, but solar cells make up for this difference.
A particular circuit is made up of a battery, a switch, a buzzer, and wires connecting the components. All of the components are in working order, but the buzzer does not make noise. Which statement explains this observation?(1 point)
Responses
The circuit lacks a power source.
The circuit lacks a power source.
The load cannot convert electrical energy.
The load cannot convert electrical energy.
The conductors are not attached.
The conductors are not attached.
The switch is open.
The switch is open.
Which purpose does a light bulb serve in a circuit?(1 point)
Responses
cell
cell
wire
wire
load
load
switch
load
Use the table to answer the question.
Electromagnet Current Intensity Number of Turns
P medium 20
Q low 20
R low 15
Which list shows the electromagnets in order from strongest magnetic force to weakest magnetic force?
(1 point)
Responses
R, Q, P
R, Q, P
Q, R, P
Q, R, P
P, Q, R
P, Q, R
R, P, Q
P, Q, R
How is an electromagnetic field produced?(1 point)
Responses
when particles are arranged around a conductor
when particles are arranged around a conductor
when an object has an electrical charge
when an object has an electrical charge
when a conductor interacts with a magnet
when a conductor interacts with a magnet
when a current runs through a conductor
when a current runs through a conductor