1. Glass is a good insulator because The atoms in glass hold on tightly to their negatively charged particles.
A. True
B. False
2. Which statement explains how the charges on objects determine the electric force between them?
A. Objects with positive charges attract each other, and objects with negative charges repel each other.
B. Objects with the same charge repel each other, and objects with opposite charges attract each other.
C. Objects with positive charges repel each other, and objects with negative charges attract each other.
D. Objects with the same charge attract each other, and objects with opposite charges repel each other.
3. Which conclusion about the interactions is correct?
A. Repulsive forces are stronger than attractive forces.
B. The objects in interaction A are smaller than in interaction B.
C. The objects in interaction A are farther apart than in interaction B.
D. Positive charges are stronger than negative charges.
4. How is an electromagnetic field produced?
[type answer]
5. When a current runs through a conductor, a/an [type answer] is produced
6. Insulators have high [blank], while conductors have high [blank].
Drag and drop the correct choice into the [blank] spaces above
[Conductivity] [electricity] [resistance] [wavelength]
7. Circuit A has a voltage of 10 V, and circuit B has a voltage of 15 V. The resistance in circuit A is [blank] the resistance in circuit B. The current of Circuit A is [blank] circuit B.
Drag and drop the correct choice into the [blank] spaces above
[the same as] [less than] [greater than]
8. How does adding a resistor to an electric circuit affect the current?
A. The resistor decreases the current by decreasing the amount of electric charge.
B. The resistor increases the current by transforming light energy or heat into electrical energy.
C. The resistor increases the current by increasing the amount of electric charge.
D. The resistor decreases the current by transforming electrical energy into different types of energy.
9. Which energy transformation happens when a toaster is plugged in to an outlet in the wall and used to make toast? Electrical energy from the outlet is converted to [type answer] and for [type answer] the toaster.
10. Energy from the sun might be greater than the energy needs of the house, so some energy will be stored and/or wasted.
A. True
B. False
11. A particular circuit is made up of a battery, a switch, a buzzer, and wires connecting the components. Would the buzzer make a noise if the switch were left OPEN? Yes or no. [type answer]
12. Label the four main parts of a simple circuit: load, conductor, power source and switch. The battery represents the [type answer]. The on/off object represents the [type answer]. The lightbulb represents the [type answer]. The wire represents the [type answer].
I don't need the answers right now, but the fastest you can would be appreciated :)
1. To determine if this statement is true or false, we need to understand the properties of glass. Glass is actually a poor conductor of heat and electricity, but it is not a good insulator either. It is considered to be a fair insulator. The atoms in glass do not necessarily hold on tightly to their negatively charged particles, and instead, the structure of glass allows for some movement of charges. Therefore, the statement is false.
2. The correct answer is B. Objects with the same charge repel each other, and objects with opposite charges attract each other. This is known as the principle of electric charge.
3. Without information about what interactions are being referred to, it is impossible to determine the correct conclusion.
4. An electromagnetic field is produced by the movement of electrical charges. When charges are in motion, they create a magnetic field around them. The combination of the electric and magnetic fields forms an electromagnetic field.
5. When a current runs through a conductor, a magnetic field is produced. This phenomenon is known as electromagnetic induction.
6. Insulators have high resistance, while conductors have high conductivity. Resistance refers to the opposition to the flow of electric current, while conductivity refers to the ability of a material to conduct electric current.
7. The resistance in circuit A is [less than] the resistance in circuit B. The current of Circuit A is [the same as] circuit B. Resistors are components that resist the flow of electric current. Therefore, if the resistance in circuit A is less than the resistance in circuit B, the current in circuit A would be greater to overcome the lower resistance.
8. The correct answer is A. Adding a resistor to an electric circuit decreases the current by decreasing the amount of electric charge. This is because resistors increase the resistance in a circuit, which hinders the flow of electric current.
9. When a toaster is plugged into an outlet, electrical energy from the outlet is converted to heat energy and is used to heat the filament of the toaster.
10. The answer is A. True. Energy from the sun might be greater than the energy needs of the house, so some energy will be stored and/or wasted. This can occur through energy storage systems such as batteries or through excess energy being fed back to the grid.
11. No. If the switch in the circuit is left open, it creates a gap in the circuit, and the flow of current is interrupted. Therefore, the buzzer will not make a noise.
12. The battery represents the power source. The on/off object represents the switch. The lightbulb represents the load. The wire represents the conductor.