# Chapter 19: DC Circuits

78 Questions | Total Attempts: 222  Settings  • 1.
The potential difference between the terminals of a battery, when no current flows to an external circuit, is referred to as the
• A.

Emf.

• B.

Terminal voltage.

• 2.
The potential difference between the terminals of a battery, when current flows to an external circuit, is referred to as the
• A.

Emf.

• B.

Terminal voltage.

• 3.
When two or more resistors are connected in series to a battery
• A.

The total voltage across the combination is the algebraic sum of the voltages across the individual resistors.

• B.

The same current flows through each resistor.

• C.

The equivalent resistance of the combination is equal to the sum of the resistances of each resistor.

• D.

• 4.
When resistors are connected in series,
• A.

The same power is dissipated in each one.

• B.

The potential difference across each is the same.

• C.

The current flowing in each is the same.

• D.

More than one of the given answers is true.

• 5.
Three identical resistors are connected in series to a battery. If the current of 12 A flows from the battery, how much current flows through any one of the resistors?
• A.

12 A

• B.

4 A

• C.

36 A

• D.

Zero

• 6.
Three identical resistors are connected in series to a 12-V battery. What is the voltage across any one of the resistors?
• A.

36 V

• B.

12 V

• C.

4 V

• D.

Zero

• 7.
You obtain a 100-W light bulb and a 50-W light bulb. Instead of connecting them in the normal way, you devise a circuit that places them in series across normal household voltage. Which statement is correct?
• A.

Both bulbs glow at the same reduced brightness.

• B.

Both bulbs glow at the same increased brightness.

• C.

The 100-W bulb glows brighter than the 50-W bulb.

• D.

The 50-W bulb glows more brightly than the 100-W bulb.

• 8.
As more resistors are added in series to a constant voltage source, the power supplied by the source
• A.

Increases.

• B.

Decreases.

• C.

Does not change.

• D.

Increases for a time and then starts to decrease.

• 9.
When two or more resistors are connected in parallel to a battery,
• A.

The voltage across each resistor is the same.

• B.

The total current flowing from the battery equals the sum of the currents flowing through each resistor.

• C.

The equivalent resistance of the combination is less than the resistance of any one of the resistors.

• D.

• 10.
When resistors are connected in parallel, we can be certain that
• A.

The same current flows in each one.

• B.

The potential difference across each is the same.

• C.

The power dissipated in each is the same.

• D.

Their equivalent resistance is greater than the resistance of any one of the individual resistances.

• 11.
Three identical resistors are connected in parallel to a 12-V battery. What is the voltage of any one of the resistors?
• A.

36 V

• B.

12 V

• C.

4 V

• D.

Zero

• 12.
Three identical resistors are connected in parallel to a battery. If the current of 12 A flows from the battery, how much current flows through any one of the resistors?
• A.

12 A

• B.

4 A

• C.

36 A

• D.

Zero

• 13.
The lamps in a string of Christmas tree lights are connected in parallel. What happens if one lamp burns out? (Assume negligible resistance in the wires leading to the lamps.)
• A.

The brightness of the lamps will not change appreciably.

• B.

The other lamps get brighter equally.

• C.

The other lamps get brighter, but some get brighter than others.

• D.

The other lamps get dimmer equally.

• E.

The other lamps get dimmer, but some get dimmer than others.

• 14.
As more resistors are added in parallel to a constant voltage source, the power supplied by the source
• A.

Increases.

• B.

Decreases.

• C.

Does not change.

• D.

Increases for a time and then starts to decrease.

• 15.
Consider three identical resistors, each of resistance R. The maximum power each can dissipate is P. Two of the resistors are connected in series, and a third is connected in parallel with these two. What is the maximum power this network can dissipate?
• A.

2P/3

• B.

3P/2

• C.

2P

• D.

3P

• 16.
Kirchhoff's loop rule is an example of
• A.

Conservation of energy.

• B.

Conservation of charge.

• C.

Conservation of momentum.

• D.

• 17.
Kirchhoff's junction rule is an example of
• A.

Conservation of energy.

• B.

Conservation of charge.

• C.

Conservation of momentum.

• D.

• 18.
If you connect two identical storage batteries together in series ("+" to "-" to "+" to "-"), and place them in a circuit, the combination will provide
• A.

Zero volts.

• B.

Twice the voltage, and different currents will flow through each.

• C.

Twice the voltage, and the same current will flow through each.

• D.

The same voltage, and different currents will flow through each.

• 19.
If you connect two identical storage batteries together in series ("+" to "-" to "-" to "+"), and place them in a circuit, the combination will provide
• A.

Zero volts.

• B.

Twice the voltage, and different currents will flow through each.

• C.

Twice the voltage, and the same current will flow through each.

• D.

The same voltage, and different currents will flow through each.

• 20.
If you connect two identical storage batteries together in parallel, and place them in a circuit, the combination will provide
• A.

Twice the voltage and twice the total charge that one battery would.

• B.

Twice the voltage and the same total charge that one battery would.

• C.

The same voltage and twice the total charge that one battery would.

• D.

D) half the voltage and half the total charge that one battery would.

• 21.
When two or more capacitors are connected in series to a battery
• A.

The total voltage across the combination is the algebraic sum of the voltages across the individual capacitors.

• B.

Each capacitor carries the same amount of charge.

• C.

The equivalent capacitance of the combination is less than the capacitance of any of the capacitors.

• D.

• 22.
As more and more capacitors are connected in series, the equivalent capacitance of the combination increases.
• A.

Always true

• B.

Sometimes true; it depends on the voltage of the battery to which the combination is connected.

• C.

Sometimes true; it goes up only if the next capacitor is larger than the average of the existing combination.

• D.

Never true

• 23.
Three identical capacitors are connected in series to a battery. If a total charge of Q flows from the battery, how much charge does each capacitor carry?
• A.

3Q

• B.

Q

• C.

Q/3

• D.

Q/9

• 24.
When two or more capacitors are connected in parallel to a battery,
• A.

The voltage across each capacitor is the same.

• B.

Each capacitor carries the same amount of charge.

• C.

The equivalent capacitance of the combination is less than the capacitance of any one of the capacitors.

• D.

• 25.
As more and more capacitors are connected in parallel, the equivalent capacitance of the combination increases.
• A.

Always true

• B.

Sometimes true; it depends on the voltage of the battery to which the combination is connected.

• C.

Sometimes true; it goes up only if the next capacitor is larger than the average of the existing combination.

• D.

Never true Back to top