Current, Resistance, and Simple Circuits - Review for AP Physics C: Electricity and Magnetism

The video tutorial covers electric current, resistance, and simple circuits for AP Physics C. It explains the concept of electric current, including conventional current and drift velocity. The tutorial delves into current density, Ohm's Law, and the differences between resistance and resistivity. It also covers electric power, the kilowatt hour, and the basics of electric circuits, including components like batteries and resistors. The video concludes with a discussion on terminal voltage and the internal resistance of batteries.

What is the unit of electric current?

• Ohm

• Volt

• Coulomb

• Ampere

In which direction does conventional current flow?

• Opposite to electron flow

• Direction of positive charges

• Random direction

• Direction of negative charges

What is drift velocity?

• The speed of light in a vacuum

• The average velocity of charge carriers in a wire

• The speed of a car on a highway

• The velocity of sound in air

What does current density represent?

• Current per unit area

• Voltage per unit area

• Resistance per unit length

• Current per unit length

Which of the following is a fundamental property of a material?

• Resistivity

• Current

• Resistance

• Voltage

How is electric power calculated using Ohm's law?

• Power equals voltage times current

• All of the above

• Power equals current squared times resistance

• Power equals voltage squared over resistance

What is a kilowatt-hour a unit of?

• Power

• Energy

• Current

• Voltage

What does the symbol epsilon (ε) represent in a circuit?

• Electric potential energy

• Electric permittivity

• Electromotive force

• Electric field

What is terminal voltage?

• The voltage across an inductor

• The voltage across a resistor

• The voltage across the terminals of a battery

• The voltage across a capacitor

What happens to terminal voltage as current through a battery increases?

• It becomes zero

• It remains constant

• It decreases

• It increases