Electricity and Magnetism

What is an electric circuit?

• A closed loop that allows electric current to flow.

• A device that stores electrical energy.

• A pathway for sound waves to travel.

• A type of resistor used in electronics.

What is the purpose of a switch in an electric circuit?

• To allow the circuit to be opened or closed.

• To increase the voltage in the circuit.

• To measure the current flowing through the circuit.

• To convert AC to DC.

What is the role of a battery in a circuit?

• To provide the electrical energy needed to drive the current.

• To store electrical energy for later use.

• To convert electrical energy into mechanical energy.

• To regulate the voltage in the circuit.

What is electromagnetic induction?

• The process of generating electric current from a changing magnetic field.

• The process of generating magnetic fields from electric currents.

• The phenomenon where electric fields are created by static charges.

• The method of converting light energy into electrical energy.

What is the relationship between voltage, current, and resistance in a circuit?

• V = I + R

• V = I - R

• V = I × R

• V = I / R

What happens to the total resistance in a series circuit when more resistors are added?

• The total resistance decreases.

• The total resistance remains the same.

• The total resistance increases.

• The total resistance fluctuates.

What do like poles of magnets do to each other?

• They attract.

• They repel.

• They neutralize each other.

• They rotate.

What size resistor is needed to produce a 3 Amp current flow with a 12 Volt battery?

• 2 Ohms

• 4 Ohms

• 6 Ohms

• 8 Ohms

How can you complete an incomplete circuit shown in a diagram?

• By placing a wire from Point A to Point D.

• By connecting Point B to Point C.

• By using a battery to power the circuit.

• By removing the resistor from the circuit.

What is the difference between conductors and insulators?

• Conductors allow electric current to flow easily, while insulators resist the flow of current.

• Conductors resist the flow of electric current, while insulators allow it to flow easily.

• Both conductors and insulators allow electric current to flow easily.

• Insulators are materials that can conduct electricity, while conductors cannot.