### All AP Physics C Electricity Resources

## Example Questions

### Example Question #1 : Circuit Relationships

A simple circuit consists of a resistor that's connected to a battery. How much power is dissipated by the resistor?

**Possible Answers:**

**Correct answer:**

Explanation:

One of the formulas for power is . We are given the values of the voltage and resistance.

Using these values, we can solve for power.

### Example Question #1 : Using Ohm's Law

What is the current delivered to the curcuit by the battery?

**Possible Answers:**

**Correct answer:**

Explanation:

Using Ohm's law to solve for the value of the current from the battery requires calculation of the equivalent resistance of the circuit.

The resistors R_{2} and R_{3} are in parallel with one another. Once combined, their requivalent resistor (R_{23}) is in series with R_{1}.

The equivalent resistance is thus given by:

Use this value and the given voltage to solve for the current in the circuit:

Phillip

Certified Tutor

Certified Tutor

University of Houston, Bachelor of Science, Chemical and Biomolecular Engineering.

Saige

Certified Tutor

Certified Tutor

Stanford University, Bachelors, Mechanical Engineering. Stanford University, Current Grad Student, Mechanical Engineering.