ELECTRICITY FOR TRADES (LOOSELEAF)
3rd Edition
ISBN: 9781260437454
Author: Petruzella
Publisher: MCG
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Textbook Question
Chapter 7.1, Problem 3RQ
Convert each of the following:
- a. 2,500 Ω to kilohms
- b. 120 kΩ to ohms
- c. 1,500,000 Ω to megohms
- d. 2.03 MΩ to ohms
- e. 0.000466 A to microamps
- f. 0.000466 A to milliamps
- g. 378 mV to volts
- h. 475 Ω to kilohms
- i. 28 μA to amps
- j. 5 kΩ + 850 Ω to kilohms
- k. 40,000 kV to megavolts
- l. 4,600,000 μA to amps
- m. 2.2 kΩ to ohms
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In a rectifier circuit , DC output voltage and RMS output voltage is 0.3 V & 0.55 V respectively.
The form factor of this circuit is
a. 3.67
b. 0.55
c. 1.35
d. 1.83
Calculate the voltage across R2 when the voltage drop
across the diodes is 0.3 Vdc.
CR1
CR2
E Vs
Š R3
1202
S R4
15V
3002
2 R1
2 R2
8000
4502
А
15 V
O V
1.9174 V
12.7826 V
The true value of a current is 10mA and it is indicated with a digital ammeter as 12mA. The
absolute error for this measurement system is
mA.
O a. 2
O b. 0.16
C. -2
O d. 0.2
Chapter 7 Solutions
ELECTRICITY FOR TRADES (LOOSELEAF)
Ch. 7.1 - What is the base unit and symbol used for...Ch. 7.1 - Write the metric prefix and symbol used to...Ch. 7.1 - Convert each of the following: a. 2,500 to...Ch. 7.2 - State Ohms law.Ch. 7.2 - List the three formulas associated with Ohms law.Ch. 7.2 - Calculate the unknown value for each circuit (a)...Ch. 7.2 - A pilot lamp with 12 volts applied to it draws a...Ch. 7.2 - A resistor has a resistance of 220 . The current...Ch. 7.2 - An electric soldering iron with a 40- heating...Ch. 7.2 - A baseboard heater draws a current of 8 A when...
Ch. 7.2 - A sensor module has an internal resistance of...Ch. 7.2 - The current through and the voltage drop across a...Ch. 7.2 - The heating element for an electric floor heating...Ch. 7.2 - How much power is lost in the form of heat when 25...Ch. 7.2 - The voltage drop across a 330- resistor is...Ch. 7.2 - A digital multimeter display indicates a reading...Ch. 7.2 - Calculate the unknown value for each circuit (a)...Ch. 7.2 - Assume that applying 120 volts to a resistive load...Ch. 7.2 - The voltage drop across a 10-W, 330- resistor is...Ch. 7.2 - The cold resistance of a tungsten lamp filament is...Ch. 7.2 - An electric baseboard heater is rated for 1200 W...Ch. 7.2 - A lamp dimmer switch is rated for 5 A at 120 V....Ch. 7.2 - A 400-W 4- public address speaker is to be fused...
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