Which statement explains how the charges on objects determine the electric force between them? (1 point)
Responses
Objects with the same charge attract each other, and objects with opposite charges repel each other.
Objects with the same charge attract each other, and objects with opposite charges repel each other.
Objects with the same charge repel each other, and objects with opposite charges attract each other.
Objects with the same charge repel each other, and objects with opposite charges attract each other.
Objects with positive charges attract each other, and objects with negative charges repel each other.
Objects with positive charges attract each other, and objects with negative charges repel each other.
Objects with positive charges repel each other, and objects with negative charges attract each other.
Non-Contact Forces Unit Test
2 of 132 of 13 Items
Question
Use the table of electric force between objects in two different interactions to answer the question.
Interaction Charge on Object 1 (C) Charge on Object 2 (C) Amount of Force
A +1 –2 weak
B +1 +2 strong
Which conclusion about the interactions is correct?
(1 point)
Responses
Repulsive forces are stronger than attractive forces.
Repulsive forces are stronger than attractive forces.
Positive charges are stronger than negative charges.
Positive charges are stronger than negative charges.
The objects in interaction A are farther apart than in interaction B.
The objects in interaction A are farther apart than in interaction B.
The objects in interaction A are smaller than in interaction B.
The objects in interaction A are smaller than in interaction B.
Why is glass a good insulator? (1 point)
Responses
The atoms in glass do not hold on tightly to their positively charged particles.
The atoms in glass do not hold on tightly to their positively charged particles.
The atoms in glass hold on tightly to their positively charged particles.
The atoms in glass hold on tightly to their positively charged particles.
The atoms in glass do not hold on tightly to their negatively charged particles.
The atoms in glass do not hold on tightly to their negatively charged particles.
The atoms in glass hold on tightly to their negatively charged particles.
Which statement describes a difference between insulators and conductors? (1 point)
Responses
Insulators have high conductivity, while conductors have low conductivity.
Insulators have high conductivity, while conductors have low conductivity.
Insulators have high resistance, while conductors have low resistance.
Insulators have high resistance, while conductors have low resistance.
Insulators are made of metallic materials, while conductors are not.
Insulators are made of metallic materials, while conductors are not.
Insulators can transmit electric current, while conductors cannot.
Circuit A has a voltage of 10 V, and circuit B has a voltage of 15 V. Which statement about the circuits is correct? (1 point)
Responses
If the resistance in Circuit A equals the resistance in Circuit B, then the current in Circuit A is greater than the current in Circuit B.
If the resistance in Circuit A equals the resistance in Circuit B, then the current in Circuit A is greater than the current in Circuit B.
If the current in Circuit A equals the current in Circuit B, then the resistance in Circuit A equals the resistance in Circuit B.
If the current in Circuit A equals the current in Circuit B, then the resistance in Circuit A equals the resistance in Circuit B.
If the current in Circuit A is greater than the current in Circuit B, then the resistance in Circuit A is less than the resistance in Circuit B.
If the current in Circuit A is greater than the current in Circuit B, then the resistance in Circuit A is less than the resistance in Circuit B.
If the resistance in Circuit A is greater than the resistance in Circuit B, then the current in Circuit A is greater than the current in Circuit B.
How does adding a resistor to an electric circuit affect the current?(1 point)
Responses
The resistor increases the current by increasing the amount of electric charge.
The resistor increases the current by increasing the amount of electric charge.
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 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 increases the current by transforming light energy or heat into electrical energy.
Which energy transformation happens when a toaster is plugged into 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.
Solar cells are used to power a person’s house. Which statement about the process is correct? (1 point)
Responses
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 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 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.
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 a noise. Which statement explains this observation? (1 point)
Responses
The conductors are not attached.
The conductors are not attached.
The switch is open.
The switch is open.
The circuit lacks a power source.
The circuit lacks a power source.
The load cannot convert electrical energy
Which purpose does a light bulb serve in a circuit?(1 point)
Responses
cell
cell
switch
switch
wire
wire
load