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Name _________________________________________________________________________ Date _________________________
Instructor _____________________________________________________________________ Score ________________________
Chapter
18
h
a
p
te
r
hapter
Objective: After studying this chapter, you will be able to compare the operating characteristics of series,
parallel, and series-parallel circuits and explain the operation of a frame-ground circuit.
Circuit Types
1. A(n) _____ is a closed electrical path for current. _________________________________________________
2. Identify the circuit types illustrated below.
Circuit Types and Ohm’s Law
A
B
C
(A) _____________________________________________
(B) _____________________________________________
(C) _____________________________________________
3. A(n) _____ circuit has only one path for current. _________________________________________________
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102 Modern Automotive Technology Workbook
4. If a string of lights is wired in _____, one burned-out _________________________________________________
bulb will not affect the operation of the other bulbs in
the circuit.
________ 5. A frame-ground circuit uses the vehicle’s _____ to return electricity to the power source.
(A) metal structure
(B) windshield
(C) electrical system
(D) tires
6. Explain conventional current theory.
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7. Which battery cable is bolted to the vehicle frame to allow the metal structure of the vehicle to serve as a
large conductor to carry current?
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8. The wire that carries current to the load is the _____ wire. _________________________________________________
9. The _____ is the part of the circuit between the load _________________________________________________
and the negative terminal of the battery.
Ohm’s Law
10. Defi ne Ohm’s law.
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11. Name the three formulas that represent Ohm’s law.
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________ 12. A change in _____ affects the amount of current in a circuit.
(A) resistance
(B) voltage
(C) Both A and B.
(D) None of the above.
13. Most automotive electrical problems are caused _________________________________________________
by a change in circuit _____.
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Chapter 18 Circuit Types and Ohm’s Law 103
Name _________________________________________________________________________
Circuit Calculations
14. Name the three general rules that apply to a series circuit.
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15. Name the three basic rules of parallel circuit calculations.
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16. The _____ of a number equals 1 divided by that number. _________________________________________________
17. In a series-parallel circuit, you can fi nd the total _________________________________________________
resistance of the circuit by calculating the resistance of
each parallel section and then adding the series
resistances to these values to obtain a single _____
resistance.
________ 18. The unit of measure for electric power is the _____.
(A) amp
(B) volt
(C) watt
(D) ohm
19. What is the formula for power?
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________ 20. Power ratings for hybrid motor-generators and HV batteries can be given in _____.
(A) amps
(B) volts
(C) ohms
(D) kilowatts
21. Vehicle batteries may have a watt rating to indicate _________________________________________________
their _____ potential.
22. To avoid having to read and write large numbers _________________________________________________
representing electrical values, _____ are used with
these values to indicate a multiplier, or exponent, of
the value.
23. One _____ equals 1000 . _________________________________________________
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104 Modern Automotive Technology Workbook
24. How many ohms are indicated by 5 M?
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________ 25. Which of the following is not one of the most commonly used prefi xes in automotive
electronics?
(A) milli
(B) exa
(C) kilo
(D) micro