Electricity - Lesson 4 - Ohm's Law

What are the negatively charged particles that move inside wires when a charger is plugged in?

• Protons

• Neutrons

• Electrons

• Ions

What is the flow of electrons in a wire called?

• Magnetic field

• Electric current

• Thermal energy

• Light wave

What pushes electrons along the wires?

• Gravity

• Friction

• Voltage

• Magnetism

What causes resistance in a wire?

• Free electrons moving in a straight line

• Free electrons colliding with each other and fixed atoms

• Fixed atoms moving freely

• Electrons moving without collision

What effect does resistance have on a wire and connected devices?

• Cools them down

• Makes them heat up

• Stops the electric current

• Increases the electric current

What is the unit of measurement for electric current?

• Volts

• Amperes

• Ohms

• Watts

What does an ammeter measure?

• Voltage

• Resistance

• Current

• Power

How is an ammeter connected in a circuit?

• In parallel

• In series

• In diagonal

• In isolation

What is the flow of charge in a circuit called?

• Voltage

• Resistance

• Current

• Power

What is voltage also referred to as?

• Current

• Resistance

• Potential difference

• Power