Physics Chapter 18 A Multiple Choice

How does the potential difference across the bulb in a flashlight compare with the terminal voltage of the batteries used to power the flashlight? Select one: a. The potential difference is equal to the terminal voltage. b. The potential difference is less than the terminal voltage. c. It cannot be determined unless the internal resistance of the batteries is known. d. The potential difference is greater than the terminal voltage.

a

If a 9.0 V battery is connected to a lightbulb, what is the potential difference across the bulb? Select one: a. 9.0 V b. 4.5 V c. 18 V d. 3.0 V

a

In any complex resistance circuit, the voltage across any resistor in the circuit is always Select one: a. equal to or less than the voltage source. b. greater than the voltage source. c. less than the voltage source. d. equal to the voltage source.

a

Three resistors with values of 3.0 Ω , 6.0 Ω , and 12 Ω are connected in parallel. What is the equivalent resistance (Ω ) of this combination? Select one: a. 1.7 b. 21 c. 0.26 d. 9.0

a

Two resistors having the same resistance value are wired in parallel. How does the equivalent resistance compare to the resistance value of a single resistor? Select one: a. The equivalent resistance is half the value of a single resistor. b. The equivalent resistance is twice the value of a single resistor. c. The equivalent resistance is greater than that of a single resistor. d. The equivalent resistance is the same as a single resistor.

a

Which of the following statements about a battery as a source of electric current is not true? Select one: a. The terminal voltage of a battery is equal to its emf. b. A battery provides the energy that moves charge. c. A battery is a source of emf. d. The terminal voltage of a battery is the voltage it delivers to the load.

a

A circuit has a continuous path through which charge can flow from a voltage source to a device that uses electrical energy. What is the name of this type of circuit? Select one: a. a short circuit b. a closed circuit c. a circuit schematic d. an open circuit

b

Three resistors with values of 3.0 Ω , 6.0 Ω , and 12 Ω are connected in series. What is the equivalent resistance (in Ω )of this combination? Select one: a. 1.7 b. 21 c. 0.58 d. 7.0

b

Three resistors with values of 4.0 Ω , 6.0 Ω , and 10.0 Ω are connected in parallel. What is their equivalent resistance, Ω? Select one: a. 6.0 b. 1.9 c. 20.0 d. 7.3

b

If the potential difference across a pair of batteries used to power a flashlight is 6.0 V, what is the potential difference across the flashlight bulb? Select one: a. 9.0 V b. 12 V c. 6.0 V d. 3.0 V

c

If the potential difference across the bulb in a camping lantern is 9.0 V, what is the potential difference across the battery used to power it? Select one: a. 3.0 V b. 18 V c. 9.0 V d. 1.0 V

c

Three resistors with values of 4.0 W, 6.0 W, and 8.0 W, respectively, are connected in series. What is their equivalent resistance? Select one: a. 6.0 Ω b. 8.0 Ω c. 18 Ω d. 1.8 Ω

c

Two resistors with values of 6.0 Ω and 12 Ω are connected in parallel. This combination is connected in series with a 4.0 Ω resistor. What is the equivalent resistance (Ω ) of this combination? Select one: a. 2.0 b. 0.50 c. 8.0 d. 22

c

A circuit is composed of resistors wired in series. What is the relationship between the equivalent resistance of the circuit and the resistance of the individual resistors? Select one: a. The equivalent resistance is greater than the sum of all the resistances in the circuit. b. The equivalent resistance is less than the smallest resistance in the circuit. c. The equivalent resistance is equal to the largest resistance in the circuit. d. The equivalent resistance is equal to the sum of the individual resistances.

d

If the batteries in a portable CD player provide a terminal voltage of 12 V, what is the potential difference across the entire CD player? Select one: a. 4.0 V b. 3.0 V c. 6.0 V d. 12 V

d

The equivalent resistance of a complex circuit is usually determined by Select one: a. dividing the sum of the individual resistances by the number of resistances. b. inspection. c. adding and subtracting individual resistances. d. simplifying the circuit into groups of series and parallel circuits.

d

Three resistors connected in series carry currents labeled I^1, I^2, and I^3, respectively. Which of the following expresses the total current, It, in the system made up of the three resistors in series? Select one: a. It = (1/I^1 + 1/I^2 + 1/I^3) b. It = (1/I^1 + 1/I^2 + 1/I^3) c. It = I^1 + I^2 + I^3 d. It = I^1 = I^2 = I^3

d

To find the current in a complex circuit, it is necessary to know the Select one: a. number of branches in the circuit. b. potential difference in each device in the circuit. c. current in each device in the circuit. d. equivalent resistance of the circuit.

d

Which of the following is the best description of a schematic diagram? Select one: a. shows some of the parts that make up a circuit b. determines the location of the parts of a circuit c. uses pictures to represent the parts of a circuit d. shows the parts of a circuit and how the parts connect to each other

d

https://peltzphysics.moodle.school/pluginfile.php/135/question/questiontext/43314/2/1938/Capture.JPG What happens when the switch is closed in the circuit shown above? Select one: a. The lamp lights because current from the battery flows through the lamp. b. Current from the battery is carried through the resistor. c. Current from the battery is carried through both the lamp and the resistor. d. The lamp goes out, because the battery terminals connect to each other.

d