Chapter 18 Questions

Question 1

When two or more resistors are connected in series, the equivalent resistance is always _______ any individual resistance

Answer 1

greater than

Question 2

When two or more resistors are connected in parallel, the equivalent resistance is always ______ any individual resistance

Answer 2

less than

Question 3

An uncharged series RC circuit is to be connected across a battery. For each of the following charges, determine whether the time for the capacitor to reach 90% of its final charge would increase, decrease or remain unchanged: the RC time constant tau is doubled

Answer 3

the charging time increases

Question 4

An uncharged series RC circuit is to be connected across a battery. For each of the following charges, determine whether the time for the capacitor to reach 90% of its final charge would increase, decrease or remain unchanged: the battery voltage is doubled

Answer 4

the charging time remains the same

Question 5

An uncharged series RC circuit is to be connected across a battery. For each of the following charges, determine whether the time for the capacitor to reach 90% of its final charge would increase, decrease or remain unchanged: a second resistor is added in series with the original resistor

Answer 5

the charging time increases

Question 6

While discharging, the terminal voltage of the battery can never be greater than the EMF of the battery

Answer 6

true

Question 7

Suppose you have three identical lightbulbs, some wire, and a battery. You connect one lightbulb to the battery and take note of its brightness. You add a second lightbulb, connecting it in parallel with the previous lightbulbs, again take note of the brightness. REpeat the process with the third lightbulb, connecting it in parallel with the other two. As the lightbulbs are added, how are the following properties affected: brighness of the bulbs

Answer 7

remain unchanged

Question 8

Suppose you have three identical lightbulbs, some wire, and a battery. You connect one lightbulb to the battery and take note of its brightness. You add a second lightbulb, connecting it in parallel with the previous lightbulbs, again take note of the brightness. REpeat the process with the third lightbulb, connecting it in parallel with the other two. As the lightbulbs are added, how are the following properties affected: individual currents in the bulb

Answer 8

remain unchanged

Question 9

Suppose you have three identical lightbulbs, some wire, and a battery. You connect one lightbulb to the battery and take note of its brightness. You add a second lightbulb, connecting it in parallel with the previous lightbulbs, again take note of the brightness. REpeat the process with the third lightbulb, connecting it in parallel with the other two. As the lightbulbs are added, how are the following properties affected: power delivered by the battery

Answer 9

increases

Question 10

Suppose you have three identical lightbulbs, some wire, and a battery. You connect one lightbulb to the battery and take note of its brightness. You add a second lightbulb, connecting it in parallel with the previous lightbulbs, again take note of the brightness. REpeat the process with the third lightbulb, connecting it in parallel with the other two. As the lightbulbs are added, how are the following properties affected: lifetime of the battery

Answer 10

decreases

Question 11

Suppose you have three identical lightbulbs, some wire, and a battery. You connect one lightbulb to the battery and take note of its brightness. You add a second lightbulb, connecting it in series with the previous lightbulbs, again take note of the brightness. Repeat the process with the third lightbulb, connecting it in series with the other two. As the lightbulbs are added, how are the following properties affected: Brightness of the bulb

Answer 11

decreases

Question 12

Suppose you have three identical lightbulbs, some wire, and a battery. You connect one lightbulb to the battery and take note of its brightness. You add a second lightbulb, connecting it in series with the previous lightbulbs, again take note of the brightness. Repeat the process with the third lightbulb, connecting it in series with the other two. As the lightbulbs are added, how are the following properties affected: individual currents in the bulbs

Answer 12

decreases

Question 13

Suppose you have three identical lightbulbs, some wire, and a battery. You connect one lightbulb to the battery and take note of its brightness. You add a second lightbulb, connecting it in series with the previous lightbulbs, again take note of the brightness. Repeat the process with the third lightbulb, connecting it in series with the other two. As the lightbulbs are added, how are the following properties affected: power delivered by the battery

Answer 13

decreases

Question 14

Suppose you have three identical lightbulbs, some wire, and a battery. You connect one lightbulb to the battery and take note of its brightness. You add a second lightbulb, connecting it in series with the previous lightbulbs, again take note of the brightness. Repeat the process with the third lightbulb, connecting it in series with the other two. As the lightbulbs are added, how are the following properties affected: lifetime of the battery

Answer 14

increases