27. Resistors & DC Circuits

Three resistors with resistances $R=2\Omega$, $R=4\Omega$, and $R=6\Omega$ are connected in series to a $12V$ battery. What is the current through the $4\Omega$ resistor?

Three resistors with resistances $R_1$ = $2$ $\Omega$, $R_2$ = $4$ $\Omega$, and $R_3$ = $6$ $\Omega$ are connected in series. What is the equivalent resistance of the resistor network?

Given four circuits, each containing three identical resistors of resistance $R$, which arrangement results in the smallest equivalent resistance?

If three resistors with resistances $R_1$, $R_2$, and $R_3$ are connected in series, what is the equivalent resistance of the group?

When two resistors are connected in series, which physical quantity must be the same for both resistors?

What is the equivalent resistance of the following combination of resistors?

What is the equivalent resistance of the following combination of resistors?

If every resistor below has resistance R, what is the equivalent resistance of the combination, in terms of R?

Light Bulbs in Series and in Parallel. Two light bulbs have constant resistances of 400Ω and 800Ω. The two light bulbs are connected in series across a 120 V line. Afterwards, the two light bulbs are connected in parallel across the 120 V line. In which situation is there a greater total light output from both bulbs combined?

Light Bulbs in Series and in Parallel. Two light bulbs have constant resistances of 400Ω and 800Ω. The two light bulbs are connected in series across a 120 V line. Afterwards, the two light bulbs are connected in parallel across the 120 V line. In each situation, which of the two bulbs glows the brightest?

Light Bulbs in Series and in Parallel. Two light bulbs have constant resistances of 400Ω and 800Ω. The two light bulbs are now connected in parallel across the 120 V line. Find the total power dissipated in both bulbs.

Light Bulbs in Series and in Parallel. Two light bulbs have constant resistances of 400Ω and 800Ω. The two light bulbs are now connected in parallel across the 120 V line. Find the power dissipated in each bulb.