Week 1 Practice Problems
Maria Saavedra
ECT122 Week 1
05/07/2014
Chapter 1Chapter 2 Chapter 3 Practice Problems *(Be sure to put the units in; volts, amps, etc.)
1.One coulomb of charge passes a point every 20 seconds. Calculate the value of the current through the point. I=Q/t = 1C/20s = .05C/s= .05 A x10^-3 C = 50mA
2.A total charge of 2.5 × 10-3 C passes a point every 40 seconds. Calculate the value of the current through the point. I=Q/t =0.0025C/40s= 6.25 C/s = 6.25 A
4.A total charge of 50 × 10-3 C passes a point every 2.5 seconds. Calculate the value of the current through the point. I= Q/t = 0.05C/2.5s = .02C/s = 0.2 Ax10^-3 = 20mA
6.Calculate the conductance of a 1.5 MΩ resistor.
G=IR= 1/1.5 MΩ = 6.66666667x10^6 s= 666.67 nS
7.Calculate the conductance of a 510 kΩ resistor.
G=I/R = 1/510 kΩ=.0019607843x10^3 s= 1.96us
23.Convert each of the following to engineering notation.
a.1.11 × 108 Hz= 11x10^6Hz
b.0.022 × 10-6 F 0022x10^-9 F = 0022nF = 22nF
24. a.0.00128 A (0.001,28)=1.28mA
b.0.000047 H (0.000,047)= 47uH
3.Determine the guaranteed range of values for a 360 kΩ resistor with a 5% tolerance.
342kΩ - 378kΩ
5.For each of the color codes listed, determine the rated value of the component.
Band 1
Band 2
Band 3
Value
a. Brown
Blue
Brown
_Gold _160k value- ranges 152Ω - 168Ω
c. Orange
White
Yellow
_Gold__ 390k Value- ranges370.5kΩ - 409.5kΩ
e. Yellow
Violet
Gold
__Gold 4.7k value__ranges- 4.465Ω - 4.935Ω_
7.Determine the colors of the first three bands for each of the following resistor values.
a.33 kΩ Orange, orange, orange, gold
c.910 kΩ White, brown, yellow, gold
f.10 MΩ Brown, black, blue, gold
h.0.24 Ω Red, yellow, silver, gold
10.For each of the color codes listed, determine the rated component value and the guaranteed range of measured values.
a.Yellow–Orange–Silver–Gold .43k Ω
b.Brown–Gray–Yellow–Gold –180 kΩ
c.Yellow–Violet–Orange–Silver- 470k Ω
d.Brown–Green–Silver–Gold .15k Ω
12.Convert the following numbers to engineering notation form without
ECT122 Week 1
05/07/2014
Chapter 1Chapter 2 Chapter 3 Practice Problems *(Be sure to put the units in; volts, amps, etc.)
1.One coulomb of charge passes a point every 20 seconds. Calculate the value of the current through the point. I=Q/t = 1C/20s = .05C/s= .05 A x10^-3 C = 50mA
2.A total charge of 2.5 × 10-3 C passes a point every 40 seconds. Calculate the value of the current through the point. I=Q/t =0.0025C/40s= 6.25 C/s = 6.25 A
4.A total charge of 50 × 10-3 C passes a point every 2.5 seconds. Calculate the value of the current through the point. I= Q/t = 0.05C/2.5s = .02C/s = 0.2 Ax10^-3 = 20mA
6.Calculate the conductance of a 1.5 MΩ resistor.
G=IR= 1/1.5 MΩ = 6.66666667x10^6 s= 666.67 nS
7.Calculate the conductance of a 510 kΩ resistor.
G=I/R = 1/510 kΩ=.0019607843x10^3 s= 1.96us
23.Convert each of the following to engineering notation.
a.1.11 × 108 Hz= 11x10^6Hz
b.0.022 × 10-6 F 0022x10^-9 F = 0022nF = 22nF
24. a.0.00128 A (0.001,28)=1.28mA
b.0.000047 H (0.000,047)= 47uH
3.Determine the guaranteed range of values for a 360 kΩ resistor with a 5% tolerance.
342kΩ - 378kΩ
5.For each of the color codes listed, determine the rated value of the component.
Band 1
Band 2
Band 3
Value
a. Brown
Blue
Brown
_Gold _160k value- ranges 152Ω - 168Ω
c. Orange
White
Yellow
_Gold__ 390k Value- ranges370.5kΩ - 409.5kΩ
e. Yellow
Violet
Gold
__Gold 4.7k value__ranges- 4.465Ω - 4.935Ω_
7.Determine the colors of the first three bands for each of the following resistor values.
a.33 kΩ Orange, orange, orange, gold
c.910 kΩ White, brown, yellow, gold
f.10 MΩ Brown, black, blue, gold
h.0.24 Ω Red, yellow, silver, gold
10.For each of the color codes listed, determine the rated component value and the guaranteed range of measured values.
a.Yellow–Orange–Silver–Gold .43k Ω
b.Brown–Gray–Yellow–Gold –180 kΩ
c.Yellow–Violet–Orange–Silver- 470k Ω
d.Brown–Green–Silver–Gold .15k Ω
12.Convert the following numbers to engineering notation form without