ConceptuAL Physics practice page

Chapter $23$ Electric Current

Series Circuits

In the circuit shown at the right, a voltage of $6$ V pushes charge through a single resistor of $2.$ According to Ohm's law, the current in the resistor $($and therefore in the whole circuit$)$ is

$$ A$.$

Two $3-$ resistors and a $6-$V battery comprise the circuit on the right. The total resistance of the circuit is $.$

The current in the circuit is then $$ A$.$

$3.$ The equivalent resistance of three $4-$ resistors in series would be

$.$

$4.$ Does current flow through a resistor, or across a resistor? $q,$

Is voltage established through a resistor, or across a resistor? $$

$5.$ Does current in the lamps of a circuit occur simultaneously, or does charge flow first through one lamp, then the other, and finally the last in turn?

$q,$

$6.$ Circuits a and $b$ below are identical with all bulbs rated at equal wattage $($therefore equal resis:ance$).$ The only difference between the circuits is that Bulb $5$ has a short circuit, as shown.

$$

$$

a$.$ In which circuit is the current greater? $$

b$.$ In which circuit are all three bulbs equally bright? $$

c$.$ Which bulbs are the brightest?