Name: 
 

Ch 22 Current Electricity Test - Section 1


Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 
A __________ is described as a device with specific resistance and is used to control current.
a.
series connection
c.
resistor
b.
parallel connection
d.
battery
 

 2. 
A lamp draws a current of 0.50 A when it is connected to a 120 V source?  What is the resistance of the lamp?
a.
4.17 mc002-2.jpg 10-2 ohms
c.
2.4 mc002-4.jpg 102 ohms
b.
24 mc002-3.jpg 102 ohms
d.
60 ohms
 

 3. 
A/An _____ is described as a closed loop or pathway that allows electric charges to flow, whereas a/an _____ is described as a flow of charged particles.
a.
conventional current, electric current
c.
conventional current, electric circuit
b.
electric circuit, electric current
d.
electric current, electric circuit
 

 4. 
The flow of electric charge or current equal to one coulomb per second is a/an _____.
a.
ampere
c.
volt
b.
kilowatt hour
d.
ohm
 

 5. 
Which of the following circuits can be used to test whether or not a wire of a laminated heating element is cut internally?
a.
mc005-1.jpg
c.
mc005-3.jpg
b.
mc005-2.jpg
d.
mc005-4.jpg
 

 6. 
In the circuit shown below, which bulb, when burned out, will cause all other bulbs to stop glowing?

mc006-1.jpg
a.
F
c.
B
b.
A
d.
C
 

 7. 
A motor with an operating resistance of 32 ohms is connected to a voltage source.  The current in the circuit is 3.8 A.  What is the voltage of the source?
a.
1,216 V
c.
.12 V
b.
8.42 V
d.
1.2 mc007-2.jpg 102 V
 

 8. 
A/An _____ is described as the flow of positive charges that move from a higher to lower potential energy.
a.
conventional current
c.
conventional circuit
b.
electric circuit
d.
electron flow
 

 9. 
A/An _____ is the flow of positive charges that move from higher to lower potential energy, whereas a/an _____ is described as a flow of charged particles.
a.
conventional current, electric current
c.
conventional current, electric circuit
b.
electric circuit, conventional current
d.
electric current, conventional current
 

 10. 
A lightbulb uses 75 W of power when it is connected across a 125 V source. What current does the lamp draw?
a.
1.67 A
c.
0.60 A
b.
9.375 A
d.
9.38 A
 

 11. 
A _____ is described as a device that converts chemical energy to electric energy.
a.
capacitor
c.
resistor
b.
lightbulb
d.
battery
 

 12. 
_____ is described as a property that determines how much current will flow for a given battery voltage.
a.
Resistance
c.
Kilowatt-hour
b.
Resistor
d.
Thermal energy
 

 13. 
A sensor uses 2.0 mc013-1.jpg 10-4 A of current when it is operated by a 3.0 V battery.  What is the resistance of the sensor circuit?
a.
1.5 mc013-3.jpg 104 ohms
c.
6.0 mc013-5.jpg 10-4 ohms
b.
6.7 mc013-4.jpg 10-5 ohms
d.
6.9 mc013-6.jpg 104 ohms
 

 14. 
A/An _____ is a type of electric circuit in which there are multiple paths, whereas a/an _____ is a type of electric circuit in which there is a single current path. 
a.
series connection, parallel connection
c.
conductor, insulator
b.
insulator, conductor
d.
parallel connection, series connection
 

 15. 
_____ is a property that determines how much current will flow for a given source voltage, whereas a _____ is a device that controls the current in a circuit.
a.
Battery, resistance
c.
Resistance, resistor
b.
Resistance, battery
d.
Resistor, resistance
 

 16. 
In the circuit shown below, the ammeter shows that there is a current. However, the bulb does not light because:

mc016-1.jpg
a.
the variable resistance has a large value
b.
the wire between the cell and the bulb is broken
c.
the battery terminal is loose
d.
the bulb is burned out
 

 17. 
A car panel lamp has a resistance of 33 ohms when it is placed across a 12 V battery.  What is the current through the circuit?
a.
3.96 A
c.
.36 A
b.
2.8 A
d.
396 A
 

 18. 
A/An _____ is described as the flow of charged particles.
a.
electric current
c.
electric potential difference
b.
gravitational force
d.
electric field
 

 19. 
A lamp uses 15 W of power when it is connected across 25 V.  What is the current through the lamp?
a.
93.8 mc019-1.jpg 103 A
c.
0.60 A
b.
9.38 mc019-2.jpg 103 A
d.
1.67 A
 

 20. 
A/An _____ is a type of electric circuit in which there is a single current path.
a.
parallel connection
c.
series connection
b.
conventional current
d.
electric current
 

 21. 
A lightbulb uses 100 W of power when connected across 120 V.  What is the current drawn by the lightbulb?
a.
12. A
c.
1.0 A
b.
2.0 A
d.
0.8 A
 

 22. 
A _____ is described as a device with specific resistance and is used to control current, whereas a _____ converts chemical energy to electrical energy.
a.
battery, resistor
c.
resistor, battery
b.
insulator, resistor
d.
conductor, battery
 

 23. 
A flashlight bulb is rated at 0.90 W.  If the electric potential drop across the lightbulb is 3.0 V, how much current goes through it?
a.
0.30 A
c.
2.7 A
b.
3.33 A
d.
3.0 A
 

 24. 
A/An _____ is described as the flow of electric charge or current equal to one coulomb per second.
a.
capacitance
c.
capacitor
b.
volt
d.
ampere
 

 25. 
A/An _____ is described as a flow of charged particles.
a.
electric current
c.
resistor
b.
resistance
d.
electric circuit
 

 26. 
What is the effect on the current in a simple circuit when both the voltage and the resistance are divided by 2?
a.
multiplied by 4
c.
divided by 2
b.
multiplied by 2
d.
no change
 

 27. 
Which of the following circuits can be used to measure the resistance of the heating element, shown as a resistor in the diagrams below?
a.
mc027-1.jpg
c.
mc027-3.jpg
b.
mc027-2.jpg
d.
mc027-4.jpg
 

 28. 
A/An _____ is described as a closed loop or pathway that allows electric charges to flow.
a.
conventional current
c.
electric circuit
b.
series connection
d.
parallel connection
 

 29. 
A car battery causes a current of 2.0 A through a lamp and produces 12 V across it.  What is the power used by the lamp?
a.
6 W
c.
0.167 W
b.
24 W
d.
48 W
 

Matching (Value 8)
 
 
Define the following terms by matching them with the correct definition.
a.
electric current
e.
resistance
b.
conventional current
f.
resistor
c.
battery
g.
ampere
d.
electric circuit
h.
kilowatt-hour
 

 30. 

 a device that converts chemical energy to electric energy
 

 31. 

 a property that determines how much current will flow
 

 32. 

 a flow of charged particles
 

 33. 

 the flow of positive charges that move from higher to lower potential energy
 

 34. 

 a device with specific resistance; used to control current in circuits
 

 35. 

 an energy unit used by electric companies to measure energy use
 

 36. 

 a closed loop or pathway that allows electric charges to flow
 

 37. 

 the flow of electric charge or current equal to one coulomb per second
 

Short Answer
 

 38. 
Draw a circuit diagram showing a 2-V battery connected in series to an ammeter, a 5-W resistor, and a switch.
 

 39. 
Define resistance in terms of voltage and current without using an equation.
 

 40. 
What is electric power in terms of current and voltage?
 

 41. 
A platinum wire and a gold wire have the same length and cross-sectional area. Do they have the same resistance?
 

Problem
 

 42. 
A battery of potential difference 24 V delivers pr042-1.jpg J to a conductor. What is the quantity of charge that flows through the conductor?
 

 43. 
A 2.0-V battery is connected in a circuit with an ammeter and an unknown resistor, P. The current is observed to be 0.70 A. What would be the current in the circuit if a 12-V battery replaces the 2.0-V battery?
 

 44. 
There is a 0.40-A current in resistor X when it is connected to a 2.0-V battery. A 0.25-A current is in a second resistor, Y, when it is connected to a 4-V battery. There is a 0.50-A current in a third resistor, Z, when it is connected to a 5.0-V battery. Find the resistor that has the maximum resistance and the resistor that has the least resistance.
 

True/False (Value 10)
Indicate whether the statement is true or false.
 

 45. 
An electric current is a flow of charged particles.
 

 46. 
The flow of electric charge or current that is equal to one coulomb per second is an ampere.
 

 47. 
Resistance is a property that determines how much current will flow in a circuit.
 

 48. 
A resistor is a device that converts chemical energy into electric energy.
 

 49. 
A conventional current is the flow of positive charges that move from a higher to lower potential energy.
 

 50. 
An electric circuit is a closed loop or pathway that allows electric charges to flow.
 

 51. 
A parallel connection is a type of electric circuit in which there is a single current path.
 

 52. 
A resistor is a device that controls current in electric circuits.
 

 53. 
Using a 1-kW heater for one hour consumes more energy than using a 100-W bulb for one day.
 

 54. 
A series connection is a type of electric circuit in which there are multiple paths.
 



 
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