Electrical Systems: Cells and Resistors

In a science class, Lily is learning about different components that produce electricity. Her teacher asks the class, "What is a cell?"

• A group of resistors connected in series

• A type of battery

• A device that stores chemicals to produce electricity

• A pathway for current to flow

Abigail is conducting an experiment in her physics lab to understand electrical components. She comes across a question about the unit of resistance. What is the unit of resistance?

• Ohm (Ω)

• Volt (V)

• Watt (W)

• Ampere (A)

What does voltage describe?

• The flow of electrons

• The push that causes electric charge to flow

• The amount of resistance in a circuit

• The energy stored in a battery

In a closed circuit, a light bulb is connected to a battery. As the circuit operates, what happens to the potential energy stored in the battery?

• It is converted into kinetic energy

• It remains constant

• It is lost as heat

• It increases indefinitely

Noah is curious about how batteries work. He wonders what components make up a battery.

• A single cell

• A group of cells connected in series

• A resistor and a cell

• A circuit diagram

Jackson is trying to understand what increases the resistance of a conductor in his physics experiment. He wonders about different factors that might affect it.

• Using a better conductor material

• Increasing the length of the conductor

• Shortening the length of the conductor

• Increasing the diameter of the conductor

Arjun is setting up a simple circuit with a battery and a light bulb. He wonders about the flow of current in the circuit.

• It does not flow

• From negative to positive terminal

• From positive to negative terminal

• In both directions

Oliver is working on a small electronics project where he needs to control the flow of electricity in a circuit. He decides to use a resistor. What is the role of the resistor in his circuit?

• To increase the voltage

• To decrease the current

• To store energy

• To provide a pathway for current

Ava is learning about electricity in her physics class. Her teacher explains that conventional current is a way to describe the flow of charge in a circuit. What is conventional current?

• The flow of electrons

• The flow of negative charges

• The flow of positive charges

• The flow of energy

What happens to electrons in a conductor?

• They are trapped in the atoms

• They become delocalized and move from atom to atom

• They become static

• They flow freely without resistance