AP Physics 1: Review of Electricity

The video tutorial covers key concepts in electricity for the AP Physics One exam. It begins with an introduction to electricity, focusing on current and conductors. The tutorial then explains resistance and resistivity, highlighting their differences and dependencies. It moves on to electric potential difference, discussing its measurement in volts and its role in circuits. The video further explores series and parallel circuits, applying Kirchhoff's rules to analyze current flow. Finally, it addresses electric power, providing equations and an example problem to illustrate energy dissipation in circuits.

What is the unit of electric current?

• Volts

• Ohms

• Amperes

• Joules

Which of the following best describes resistivity?

• The total charge passing through a point in a circuit

• The potential energy per unit charge

• The rate at which charges move through a conductor

• A measure of how much a material opposes the flow of current

What is the symbol for electric potential difference?

• P

• I

• V

• R

According to Kirchhoff's loop rule, what is the sum of the electric potential differences around any closed loop in a circuit?

• Zero

• Equal to the power

• Equal to the current

• Equal to the resistance

In a series circuit, how does the equivalent resistance compare to the individual resistances?

• It is the product of the individual resistances

• It is the sum of the individual resistances

• It is the same as the largest resistance

• It is the same as the smallest resistance

What happens to the equivalent resistance when a resistor is added in parallel?

• It doubles

• It remains the same

• It decreases

• It increases

What is the formula for electric power in terms of current and resistance?

• Power = Current x Resistance

• Power = Voltage x Current

• Power = Current^2 x Resistance

• Power = Voltage^2 / Resistance

In the example problem, what is the terminal voltage of the battery?

• 12.0 volts

• 9.0 volts

• 6.0 volts

• 3.0 volts

How is electric power related to electric potential difference and resistance?

• Power = Voltage x Resistance

• Power = Voltage^2 / Resistance

• Power = Voltage / Resistance

• Power = Resistance / Voltage

What is the rate at which energy is dissipated in resistor 2 in the example problem?

• 3.4 watts

• 4.5 watts

• 5.4 watts

• 6.5 watts