Electric circuits

D. 1 Coulomb of charge with 12 Joules of energy

A 12-Volt battery would supply ___. List all that apply.

D. an electric potential difference is maintained across the circuit

A battery is needed in the circuit of your flashlight so that ____.

E. mostly in the bulb but a little in the wires

A certain electrical circuit contains a battery, wires and a light bulb. If potential energy is gained by charges at the battery location, then charges lose potential energy ____.

B. The low-R bulb will shine more brightly.

A high resistance light bulb and a low resistance light bulb are connected in parallel and powered by a 6-Volt pack of batteries. Which of the two light bulbs will shine the brightest?

C. The high-R bulb will shine more brightly.

A high resistance light bulb and a low resistance light bulb are connected in series to a 6-Volt pack of batteries. Which of the two light bulbs will shine the brightest?

A. do a lot of work on each charge it encounters

A high voltage battery can ____.

C. the same as that through the light bulb

A simple circuit containing a battery and a light bulb is shown in the diagram at the right. Use this diagram to answer the next several questions. The current through the battery is ___. a. greater than that through the light bulb b. less than that through the light bulb c. the same as that through the light bulb d. greater than that through each wire e. less than that through each wire

b. hours

Approximately how long would it take an electron to travel from the battery of a car to a head light and back (complete loop)?

D. the potential difference between their feet is low.

Birds can safely stand on high voltage electric power lines. This is because ____.

A. the + terminal of the battery

Charge flowing through this circuit is most energized at ____. Choose the one best answer.

H. 12

If 6 coulombs of charge flow past point 'A' in a circuit in 4 seconds, then ____ coulombs of charge will flow past point 'A' in 8 seconds. a. 0.67 b. 1.5 c. 2 d. 3 e. 4 f. 6 g. 8 h. 12 i. 24

B. decrease

If a third resistor (R3), identical to the other two, is added in series with the first two, then the electric potential difference (voltage drop) across each of the three individual resistors will ____.

C. increase, decrease

If a third resistor (R3), identical to the other two, is added in series with the first two, then the overall resistance will ____ and the overall current will ____.

B. pump which supplies energy to move the water from the ground to a high elevation

If an electric circuit was analogous to a water park, then the battery would be analogous to the ____.

D. the rate at which water is pumped onto the slide

If an electric circuit was analogous to a water park, then the electric current would be analogous to the ____.

F. the top of the water slide

If an electric circuit was analogous to a water park, then the positive terminal of the battery would be analogous to the ____.

G. one coulomb; one second

One ampere is the amount of current that exists when ____ flows by a certain point in a conductor in ____. a. one watt; one second b. one joule; one hour c. one electron; one second d. one electron; one hour e. one volt; one second f. one volt; one hour g. one coulomb; one second h. one coulomb; one hour

B. a large number of mobile charge carriers are moving forward per second

Suppose that the current in a typical circuit (DC) is large. This is an indication that ____.

E. already exist in the wires at your home

The charges that flow through the wires in your home ____.

D. very slow; slower than a snail

The drift velocity of mobile charge carriers in electric circuits is ____.

C. The current will be the same through points X, Y and Z.

The electric circuit shown at the right consists of a battery and three identical light bulbs. Which of the following statements are true concerning this circuit? List all that apply.

D. The electric potential difference between X and Z is the same as that between Y and W. E. The electric potential difference between Y and W is more than that between X and Y.

The electric circuit shown at the right consists of a battery and three identical light bulbs. Which of the following statements are true concerning this circuit? List all that apply.

A. 6

The electric potential difference (voltage drop) across each resistor is ___ Volts.

c. potential

The potential energy possessed per unit of charge at any given location is referred to as the electric ___. a. current b. resistance c. potential d. power

A. length of the wire is increased C. temperature of the wire is increased

The resistance of a charge-carrying conducting wire will increase as the ____. Choose all that apply.

B. supply energy to the charge C. move the charge from the - to the + terminal of the battery E. establish an electric potential difference between the + and - terminals

The role or purpose of the battery in this circuit is to ____. Choose three

A. voltage C. electric potential difference E. electric pressure

Two or more of the following words and phrases mean the same thing. Identify them by listing their letters.

B. is expressed across

Voltage ____ an electrical circuit.

E. 60

When plugged into a 120-Volt outlet, a light bulb consumes 300 joules of energy over a 5 second time period. The power of the light bulb is ____ Watts.

F. a broken filament which has resulted in an open circuit

When the light bulb in your lamp no longer works, it is because the bulb has _____.

B. electrons present everywhere in the circuit move instantly

When you turn on the room lights, they light immediately. This is best explained by the fact that ____.

A. Parallel circuits are characterized by the fact that there are multiple pathways by which charge can travel from the + terminal to the - terminal. D. The total current in a circuit increases as more and more resistors are placed in parallel in the circuit. F. Suppose that three identical resistors with a resistance of 3-ohms are placed in parallel with a 12-Volt battery. The electric potential difference across each resistor is 12 Volts. G. Suppose that two identical resistors are placed in parallel with a 12-Volt battery. The overall current in the circuit is 6 amps. The resistance of each resistor is 4 ohms.

Which of the following statements are true about a parallel circuit? List all that apply.

A. Series circuits are characterized by the fact that there is a single pathway by which charge can travel from the + terminal to the - terminal. B. During any single loop of charge around a series circuit, the charge will pass through each resistor in the circuit. C. The overall resistance of a circuit increases as more and more resistors are placed in series in the circuit.

Which of the following statements are true about a series circuit? List all that apply.

A. Electrons are the mobile charge carriers in an electric circuit. D. Charge is supplied with energy in the internal circuit and the energy is transformed into other forms in the external circuit. G. The location on an electric circuit where the charge possesses the greatest amount of electric potential energy is the + terminal of the battery.

Which of the following statements are true about an electric circuit? List all that apply

A. Electric potential can be expressed in units of volts. D. Work must be done on a + charge to move it against (i.e., in the opposite direction of) an electric field G. If a unit of charge has a high electric potential at any given location, then that charge possesses a large amount of electric potential energy at that location. H. The + terminal of a battery is a location with a higher electric potential than the - terminal of a battery. I. Charge flowing through a battery will experience a gain in electric potential. J. A 6-Volt battery would provide 12 Joules of energy to 2 Coulombs of charge as it is moved from the - to the + terminal.

Which of the following statements are true about an electric potential or electric potential difference? List all that apply.

A. The resistance of an electric circuit is a measure of the overall amount of hindrance to the flow of charge through the circuit. B. A large resistance value indicates that the charge is encountering a relatively large amount of difficulty in moving through the circuit. D. A 5-ohm resistor would allow a current of 0.5 Amperes when 2.5 Volts is impressed across it. F. The resistance of a conducting wire will increase as the length of the wire is increased. I. A threefold increase in the resistance of an electric circuit will result in a threefold decrease in the electric current.

Which of the following statements are true about an electric resistance? List all that apply.

A. Electric current is measured in units of Amperes. D. Electric current is equal to the number of Coulombs of charge which move past a point on a circuit per unit of time. G. The electric current in a circuit will increase as the electric potential impressed across a circuit is increased. H. The electric current in a circuit will triple in value as the electric potential impressed across a circuit is increased by a factor of three. J. Wider conducting wires are capable of carrying larger currents. K. If one starts getting technical about the meaning of electric current, one could argue that electric current is not something that flows past a point on a circuit, but rather something that exists to a given measure at a point on a circuit.

Which of the following statements are true about electric current? List all that apply.

B. Power is the rate at which energy is used by an electric circuit. D. A Joule/second is a unit of power. G. A charge moving through an electric circuit would gain electric potential energy in the internal circuit and lose electric potential energy in the external circuit. J. Consider two light bulbs with different power ratings. A 60-Watt light bulb has a greater resistance than a 100-Watt light bulb.

Which of the following statements are true about electric power and electric potential energy? List all that apply.

A. 1 Ampere = 1 Coulomb / second D. 1 Watt = 1 Volt • Coulomb / second E. 1 Joule / Ohm = 1 Ampere • Coulomb F. 1 Joule • Ohm = 1 Volt2 • second

Which of the following statements represent correct unit equivalencies? List all that apply.

D. The battery, which has run out of chemical reactants, has its chemicals reformed.

Which one of the following occurs when a rechargeable battery is recharged?