Objective #14

When the switch between bulbs C and D is opened, bulbs A goes out, then bulb B, and then bulb C. no bulbs go out. all four bulbs go out at the same time. bulbs A, B, and C go out at the same time. only bulb D goes out.

all four bulbs go out at the same time.

Three 300-ohm resistors in parallel give an equivalent resistance of 100 ohms less than 100 ohms. more than 900 ohms. 900 ohms. 300 ohms.

100 ohms

The current through a 10.0 ohm resistor connected to a 120.0 V power supply is 1 A. 10 A. 12 A. 120 A. none of these

12 A.

A 40.0 ohm resistor has a 4.0 A current in it. What is the voltage across the resistor? 0.10 V 4 V 10 V 160 V more than 160 V

160 V

A 4-ohm resistor is connected in parallel with a 4-ohm resistor. This combination produces an equivalent resistance of 2 ohms. 4 ohms. 6 ohms. 8 ohms. 16 ohms.

2 ohms.

A 10.0 ohm resistor has a 2.0 A current in it. What is the voltage across the resistor? 2 V 20 V more than 20 V 10 V 5 V

20 V

When a 40.0 V battery is connected to a resistor, the current through the resistor is 2.0 A. What is the resistor's value? 2 ohms 10 ohms 20 ohms 40 ohms more than 40 ohms

20 ohms

Two 400-ohm resistors in parallel give an equivalent resistance of 400 ohms. 800 ohms. less than 200 ohms. 200 ohms. more than 800 ohms.

200 ohms.

Two 200-ohm resistors in series give an equivalent resistance of less than 100-ohms. 100 ohms. 200 ohms. 400 ohms. more than 400 ohms.

400 ohms.

When a 10.0 V battery is connected to a resistor, the current through the resistor is 2.0 A. What is the resistor's value? 2 ohms 5 ohms 10 ohms 20 ohms more than 20 ohms

5 ohms

When a 20.0 V battery is connected to a resistor, the current through the resistor is 4.0 A. What is the resistor's value? 0.20 ohms 4 ohms 5 ohms 80 ohms more than 80 ohms

5 ohms

The current through a 10.0 ohm resistor connected to an 80.0 V power supply is 1 A. 8 A. 80 A. 800 A. none of these

8 A.

A 20.0 ohm resistor has a 4.0 A current in it. What is the voltage across the resistor? Selected Answer: 80 V Answers: more than 80 V 5 V 0.25 V 80 V 20 V

80 V

Three 300-ohm resistors in series give an equivalent resistance of less than 100 ohms. 100 ohms 300 ohms. 900 ohms. more than 900 ohms.

900 ohms.

The correct brightness order of these identical bulbs is A = D > B = C = E = F A > B = C > D > E = F D > A > B = C > E = F A = D > B = C > E = F B = C = E = F > A = D

A = D > B = C = E = F

The correct brightness order of these identical bulbs is A > B = C A = B > C B = C > A A = C > B A = B = C

A > B = C

The correct brightness order of these identical bulbs is A > B = C > D D > A > B = C A = B = C = D A = D > B = C A > D > B = C

A > D > B = C

Three identical light bulbs are connected to a D-cell as shown shown above. Which one of the following statements is true? The bulb between Y and Z will be the brightest. The bulb between X and Y will be the brightest. All three bulbs will have the same brightness. The bulb between Z and the battery will be the brightest.

All three bulbs will have the same brightness.

Three identical light bulbs are connected to a D-cell as shown shown above. Which one of the following statements is true? The bulb between Z and the battery will be the brightest. The bulb between X and Y will be the brightest. All three bulbs will have the same brightness. The bulb between Y and Z will be the brightest.

All three bulbs will have the same brightness.

Several light bulbs are connected in a circuit. When the switch is closed, the bulbs light one at a time. all bulbs light at once.

all bulbs light at once.

When the switch between bulbs C and D is opened, no bulbs go out. only bulb D goes out. bulbs A, B, and C go out at the same time. bulbs A goes out, then bulb B, and then bulb C. all four bulbs go out at the same time.

all four bulbs go out at the same time.

A circuit is made containing a battery and a single resistor. Decreasing the battery's electric potential difference will cause the total current in the circuit to decrease. remain the same. increase.

decrease.

As more lamps are put into a series circuit, the overall current in the power source increases. decreases. stays the same.

decreases.

The brightness of a bulb depends on how much ____________________ is converted into light energy each second. charge voltage brightness current electrical energy

electrical energy

The brightness of a bulb depends on how much ____________________ is converted into light energy each second. current electrical energy brightness voltage charge

electrical energy

What happens to bulb B if bulb C goes out? gets dimmer goes out completely unchanged gets brighter

goes out completely

What happens to bulb C if bulb B goes out? gets brighter unchanged gets dimmer goes out completely

goes out completely

What happens to bulb C if bulb B goes out? gets dimmer unchanged gets brighter goes out completely

goes out completely

What happens to bulb D if bulb A goes out? gets dimmer unchanged goes out completely gets brighter

goes out completely

As the number of resistors in a series circuit increases, the overall resistance __________ and the current in the circuit __________. increases, increases decreases, decreases increases, decreases decreases, increases stays the same, increases stays the same, decreases increases, stays the same decreases, stays the same stays the same, stays the same

increases, decreases

As more and more cells are added in series to a circuit containing a single light bulbs, the brightness of the bulb increases. decreases. does not change.

increases.

Compared to the total current in a circuit when a single lamp is connected to a battery, the total current in a circuit when two identical lamps are connected in series to the same battery will be more current. less current. the same current.

less current.

Compared to the resistance of two resistors connected in series, the same two resistors connected in parallel have the same resistance. less resistance. more resistance.

less resistance.

When two lamps are connected in parallel to a battery, the total electrical resistance that the battery senses is more than the resistance of either lamp. less than the resistance of either lamp. none of these

less than the resistance of either lamp.

Compared to the total current in a circuit when a single lamp is connected to a battery, the total current in a circuit when two identical lamps are connected in parallel to the same battery will be more current. less current. the same current.

more current.

When two resistors are connected in series to a battery, the electrical resistance that the battery senses is more than the resistance of either resistor. less than the resistance of either resistor. none of these

more than the resistance of either resistor.

Which resistor arrangement will result in the greatest total current? parallel series

parallel

Which resistor arrangement will result in the greatest total current? series parallel

parallel

A circuit is made containing a battery and a single resistor. Decreasing the battery's electric potential difference will cause the total resistance of the circuit to decrease. increase. remain the same.

remain the same.

Compared to the amount of electric current in the filament of a lamp, the amount of current in the connecting wire is incredibly, all of these. often less. definitely less. actually more. the same.

the same.

The same circuit relationships that are true for resistors are true for light bulbs. true False

true