Physics Test

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.

12

A 10-ohm resistor would allow a current of 2 Amperes when 5 Volts is impressed across it.

false

A battery is used to power a flashlight circuit. When the battery no longer works, it is because it has run out of charge

false

A miniature light bulb with a specific resistance is connected to a 1.5-Volt battery to form a circuit. If it were connected to a 6-Volt battery instead, its resistance would increase by a factor of 4.

false

As a + charge moves in the same direction as an electric field, it gains electric potential.

false

Charge is consumed as it moves through the energy transforming devices of the external circuit. For instance, the amount of charge entering a lightbulb in a second is less than that which exits the light which exits the light bulb in a second

false

During any single loop of charge around a parallel circuit, the charge will pass through each resistor in the circuit.

false

Electric current and drift speed are synonymous terms.

false

Electric current is defined as the number of Coulombs of charge which move past a point on a circuit.

false

Electric current provides a measure of how fast charge moves between two points on a circuit.

false

In an electric circuit of an automobile, the 12- Volt car battery is sometimes referred to as the internal circuit because it is located inside of the hood of the car

false

Increasing the resistance of an electric circuit will cause the current in the circuit to increase.

false

Suppose a miniature light bulb is connected to a battery in a circuit. A light bulb with a greater resistance will have a greater current.

false

Suppose that three identical resistors with a resistance of 3-ohms are placed in parallel with a 12-Volt battery. The current in the circuit is 1 Amp.

false

Suppose that three identical resistors with a resistance of 3-ohms are placed in series with a 12-Volt battery. The current in the circuit is 4 Amps.

false

Suppose that three identical resistors with a resistance of 3-ohms are placed in series with a 12-Volt battery. The electric potential difference across each resistor is 12 Volts.

false

Suppose that two identical resistors are placed in series with a 12-Volt battery. The current in the circuit is 6 amps. The resistance of each resistor is 4 ohms.

false

The electric current diminishes in value as charge progresses to locations further and further from the + terminal of the battery.

false

The electric potential difference between two points is simply the difference in potential energy possessed by charge between those two points.

false

The electric potential of a charge at a given location provides a measure of the rate at which charge flows past that point

false

The overall resistance of a circuit increases as more and more resistors are placed in parallel in the circuit.

false

The path of charge flow from + to the - terminal of the circuit can consist of nonconductive material

false

The resistance of a conducting wire will increase as the cross-sectional area of the wire is increased.

false

The total current in a circuit increases as more and more resistors are placed in series in the circuit.

false

The unit of resistance is the ampere.

false

electric potential can also be expressed in units of Joules

false

One ampere is the amount of current that exists when ____ flows by a certain point in a conductor in ____.

one coulomb; one second

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

the + terminal of the battery

A 5-ohm resistor would allow a current of 0.5 Amperes when 2.5 Volts is impressed across it.

true

A 6-Volt battery would provide 12 Joules of energy to 2 Coulombs of charge as it is moved from the - to the + terminal.

true

A large resistance value indicates that the charge is encountering a relatively large amount of difficulty in moving through the circuit.

true

A threefold increase in the resistance of an electric circuit will result in a threefold decrease in the electric current.

true

Charge flowing through a battery will experience a gain in electric potential.

true

Charge is supplied with energy in the internal circuit and the energy is transformed into other forms in the external circuit

true

During any single loop of charge around a series circuit, the charge will pass through each resistor in the circuit.

true

Electric current is equal to the number of Coulombs of charge which move past a point on a circuit per unit of time.

true

Electric current is measured in units of Amperes.

true

Electric potential can be expressed in units of volts

true

Electrons are the mobile charge carriers in an electric circuit

true

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.

true

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.

true

Parallel circuits are characterized by the fact that there are multiple pathways by which charge can travel from the + terminal to the - terminal.

true

Series circuits are characterized by the fact that there is a single pathway by which charge can travel from the + terminal to the - terminal.

true

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.

true

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.

true

The + terminal of a battery is a location with a higher electric potential than the - terminal of a battery.

true

The electric current in a circuit will increase as the electric potential impressed across a circuit is increased.

true

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.

true

The location on an electric circuit where the charge possesses the greatest amount of electric potential energy is the + terminal of the battery.

true

The overall resistance of a circuit increases as more and more resistors are placed in series in the circuit.

true

The resistance of a conducting wire will increase as the length of the wire is increased.

true

The resistance of an electric circuit is a measure of the overall amount of hindrance to the flow of charge through the circuit.

true

The total current in a circuit increases as more and more resistors are placed in parallel in the circuit.

true

Wider conducting wires are capable of carrying larger currents.

true

Work must be done on a + charge to move it against (i.e., in the opposite direction of) an electric field.

true

Two or more of the following words and phrases mean the same thing. Identify them by listing their letters. a. Voltage b. Wattage c. Electric Potential Difference d. Rate at which charge flows e. Electric Pressure f. Energy

voltage electric potential difference electric pressure