Question 1

Which of the following correctly describes the equivalent resistance $$R_{eq}$$ for three resistors $$R_1$$, $$R_2$$, and $$R_3$$ connected in series?

Accepted Answer

$$R_{eq} = R_1$ + R_2$ + R_3$

Question 2

If two identical light bulbs are connected in parallel to a battery, as shown in the image, what happens to the brightness of each bulb compared to when they are connected in series?

Accepted Answer

Each bulb is brighter in parallel than in series.

Question 3

Which equation gives the equivalent capacitance $$C_{eq}$$ for three capacitors $$C_1$$, $$C_2$$, and $$C_3$$ connected in parallel?

Accepted Answer

$$C_{eq} = C_1$ + C_2$ + C_3$

Question 4

A circuit contains two resistors, $$R_1 = 4$$\ \Omega$$ and R_2$ = 6\ \Omega$$, connected in parallel. What is the equivalent resistance $$R_{eq}$$?

Accepted Answer

$$R_{eq} = (\frac{1}{4} + \frac{1}{6}$$)^{-1}$$ = 2.4\ \Omega$$

Question 5

According to Lenz's law, what is the direction of the induced magnetic field when the magnetic flux through a loop is increasing?

Accepted Answer

The induced magnetic field points opposite to the applied magnetic field.

Question 6

Which of the following statements is true for two resistors connected in series?

Accepted Answer

The current through both resistors is the same.

Question 7

If three capacitors $$C_1$$, $$C_2$$, and $$C_3$$ are connected in series, which equation gives the equivalent capacitance $$C_{eq}$$?

Accepted Answer

$$C_{eq} = (\frac{1}{C_1$} + \frac{1}{C_2$} + \frac{1}{C_3$}$$)^{-1}$$

Question 8

A student connects two identical resistors in parallel to a battery. If each resistor is $$10\ \Omega$$, what is the equivalent resistance?

Accepted Answer

$$R_{eq} = 5\ \Omega$$

Question 9

Which of the following best describes the process for using Lenz's law to determine the direction of induced current in a loop?

Accepted Answer

Determine the direction of the applied magnetic field, how the flux is changing, the direction of the induced magnetic field opposing the change, and use the right-hand rule for the current.

Question 10

If the magnetic flux through a loop is steady (not changing), what is the induced magnetic field according to Lenz's law?

Accepted Answer

There is no induced magnetic field.

Electric Circuits, Capacitance, and Electromagnetic Induction: Key Concepts and Problem-Solving Strategies

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