Chapter 9

A high voltage battery can ____. a. do a lot of work on each charge it encounters b. do a lot of work over the course of its lifetime c. push a lot of charge through a circuit d. last a long time

a. do a lot of work on each charge it

Charge flowing through this circuit is most energized at ____. a. the + terminal of the battery b. the - terminal of the battery c. just prior to entering the light bulb d. just after exiting the light bulb

a. the + terminal of the battery

Which of the following statements represent correct unit equivalencies? List all that apply. a. 1 Ampere = 1 Coulomb / second b. 1 Joule = 1 Volt / Coulomb c. 1 Watt = 1 Joule • second d. 1 Watt = 1 Volt • Coulomb / second e. 1 Joule / Ohm = 1 Ampere • Coulomb f. 1 Joule • Ohm = 1 Volt2 • second

adef

Parallel circuit (2 resistors) with an overall voltage of 12. The electric potential difference (voltage drop) across each resistor is ______ V. a. 6 b. 12 c. 24 d. nonsense! The electric potential difference is dependent upon the actual resistance of the resistors

b. 12

Voltage _______ an electrical circuit a. goes through b. is expressed across c. is constant throughout d. is the rate at which charges move through

b. is experssed across

Te 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

c. potential

Parallel circuit (2 resistors) with an overall voltage of 12. If a third resistor, identical to the other two, is added in parallel with the first two, then the electrical potential difference across each of the three individual resistors will ________. a. increase b. decrease c. reamain the same

c. remain the same

The current through the battery is a. greater than that through the light bulb b. less than that throught 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

c. the same as that through the light bulb

Three identical light bulbs (labeled X, Y and Z) are connected to a battery as shown at the right. Which adjustments could be made to the circuit below that would increase the current at point P? List all that apply. a. increase the resistance of one of the bulbs b. increase the resistance of two of the bulbs c. decrease the resistance of two of the bulbs d. increase the voltage of the battery e. decrease the voltage of the battery f. remove one of the bulbs

cd

Three identical light bulbs are connected to a battery as shown at the right. Which adjustments could be made to the circuit that would increase the current being measured at X? Include all that apply. a. increase the resistance of one of the bulbs b. increase the resistance of two of the bulbs c. decrease the resistance of two of the bulbs d. increase the voltage of the battery e. decrease the voltage of the battery f. remove one of the bulbs

cdf

Three identical light bulbs (labeled X, Y and Z) are connected to a battery as shown at the right. Which adjustments could be made to the circuit below that would decrease the current in bulb Z? List all that apply. a. increase the resistance of bulb X b. decrease the resistance of bulb X c. increase the resistance of bulb Z d. decrease the resistance of bulb Z e. increase the voltage of the battery f. decrease the voltage of the battery g. remove bulb Y

cf

A 12-Volt battery would supply ______. a. 3 C of charge with 4 J of energy b. 4 C of charge with 3 J of energy c. 12 C of charge with 1 J of energy d. 1 C of charge with 12 J of energy e. 0.5 C of charge with 24 J of energy f. 24 C of charge with 2 J w of energy

d. 1 C of charge with 12 J of energy

Parallel circuit (2 resistors) with an overall voltage of 12. If a third resistor, identical to the other two, is added in parallel with the first two, then the overall resistance will ________ and the overall current will ______. a. increase, increase b. decrease, decrease c. increase, decrease d. decrease, increase e. increase, remain the same f. decrease, remain the same g. remain the same, increase h. remain the same, decrease

d. decrease, increase

The drift velocity of mobile charge carriers in electric circuits is _______. a. very fast; less than but very close to the speed of light b. fast; faster than the fastest car but nowhere near the speed of light c. slow; slower than Michael Jackson runs the 220-meters d. very slow; slower than a snail

d. very slow; slower than a snail

A certain electrical circuit contains a battery, wires, and a light bulb. If the potential energy is gained by charges at the battery location, then charges lose potential energy _________. a. in the wires only b. in the bulb only c. equally in the wires and the bulb d. mostly in the wires but a little in the bulb e. mostly in the bulb but a little in the wires f. nowhere

f. nowhere

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

g. one coulomb; one second

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

h. 12