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MECH1310Chapter1Homework

True/False
Indicate whether the statement is true or false.
 

 1. 
0.0047 amps can be expressed in metric units as 47 ìA.
 

 2. 
0.00015 can be expressed in powers of ten as 1.5 × 10-4.
 

 3. 
The symbol ì is an abbreviation for 10-6 or micro.
 

 4. 
Scientific notation is the most widely used form of technical notation in electronics.
 

 5. 
Engineering notation is typically used in the expression of extremely large and small quantities in the electronics field.
 

 6. 
In engineering notation, 82,500 is expressed as 8.25 × 103.
 

 7. 
In engineering notation 0.0047 is expressed as 4.7 × 10-3.
 

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

 8. 
The electrical symbol for inductance is ________.
a.
V
c.
I
b.
L
d.
C
 

 9. 
The symbol for electrical charge is ________.
a.
C
c.
Q
b.
I
d.
V
 

 10. 
The value 1.2 × 10-6 can be expressed as ________.
a.
1.2 m or milli
c.
1.2 ì or micro
b.
0.00012
d.
1.2 M or Meg
 

 11. 
If your calculator displays 3.45607 × 106, the equivalent metric value with 4 significant digits is ________.
a.
3.456 Mega
c.
3.456 kilo
b.
34.56 Mega
d.
3.456 micro
 

 12. 
The metric value 16 mA can be expressed as ________.
a.
16 × 10-6 A
c.
16 × 103 A
b.
16 × 10-3 A
d.
16 × 100 A
 

 13. 
To enter 0.00000056 into your calculator, use the entry ________.
a.
5.6 -08
c.
56 -06
b.
56 -08
d.
00056 -05
 

 14. 
Determine the correct calculation.
a.
89.4 k × 1.2 m = 1.072 km
c.
4.7 m ÷ 1.24 = .379 m
b.
5.6 ÷ 17 m = 32.9 m
d.
5600 × (9.6 × 10-7. = 5.376 milli
 

 15. 
The correct metric expression for 8.54 × 10-5 is ________.
a.
85.4 milli
c.
854 pico
b.
85.4 micro
d.
85.4 kilo
 

 16. 
If you are trying to enter the number 16,000 into your calculator, a correct entry is ________.
a.
1.6 05
c.
1.6 02
b.
1.6 04
d.
1.6 03
 

 17. 
Express 7.5 × 10-4 in milli, basic units, and micro.
a.
75 milli, 0.075, 7500 micro
c.
75 milli, 0.0075, 750 micro
b.
0.75 milli, 0.00075, 750 micro
d.
7.5 milli, 0.075, 75000 micro
 

 18. 
Express these two calculator displays in correct metric units:
5.6 -07     2.2 05      18. ______
a.
56 micro, 220 kilo
c.
0.56 micro, 0.022 Meg
b.
56 micro, 22 kilo
d.
0.56 micro, 220 kilo
 

 19. 
The electrical symbol for voltage is ________.
a.
C
c.
R
b.
V
d.
I
 

 20. 
If your calculator displays 3.5 -06, the equivalent metric value is ________.
a.
35 milli
b.
3.5 micro
c.
3.5 pico
d.
35 micro
e.
3.5 Meg
 

 21. 
Express 5.6 × 10-2 in milli, basic units, and micro.
a.
56 milli, 0.056, 56000 micro
c.
5.6 milli, 0.056, 56000 micro
b.
5600 milli, 56, 560
d.
560 milli, 5.600, 5600 micro
 

 22. 
The difference between scientific and engineering notation is ________.
a.
groupings of multiple of three digits
b.
powers of ten representation
c.
single vs multiple digits before decimal point
d.
all of these
 

 23. 
Mega is what relation to kilo?
a.
10 times
c.
1000 times
b.
100 times
d.
1,000,000 times
 

 24. 
Pico is what relation to micro?
a.
1/10th
c.
1/1,000th
b.
1/100th
d.
1/1,000,000th
 

 25. 
Convert 0.00047 microfarads (ìF) to the equivalent picofarads (pF).
a.
47 pF
c.
470 pF
b.
0.47 pF
d.
4.7 pF
 

 26. 
Add 21 mA and 8000 ìA and express the result in milliamperes.
a.
218 mA
c.
29 mA
b.
21.8 mA
d.
290 mA
 

 27. 
Multiply 3 mA by 1000 × mc027-1.jpg and express the result in microamperes.
a.
3 ìA
c.
30 ìA
b.
300 ìA
d.
3000 ìA
 

 28. 
500 mA is equal to ________.
a.
0.0005 kA
c.
0.5 Amps
b.
500,000 ìA
d.
all of the above
 

 29. 
The metric prefix ì (micro. is normally associated with ________ measurements.
a.
extremely small
c.
extremely large
b.
large
d.
small
 

 30. 
0.6 kV is equal to ________.
a.
600 V
c.
0.6 V
b.
60 V
d.
6 V
 

 31. 
86,000 expressed in scientific notation equals ________.
a.
8.6 × 103
c.
8.6 × 104
b.
8.6 × 10-4
d.
860 × 102
 



 
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