ELECTRICITY FOR TRADES (LOOSELEAF)
3rd Edition
ISBN: 9781260437454
Author: Petruzella
Publisher: MCG
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Textbook Question
Chapter 7.2, Problem 9RQ
The current through and the voltage drop across a precision resistor are measured and found to be 8 mA and 1.5 V, respectively. What is the resistance value of the resistor?
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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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- 5. A digital voltmeter indicates a voltage of 2.5 V when 10 of current flow through a resistor. What is the resistance of the resistor?arrow_forwardHow is resistance commonly measured? a. amperes b. ohms c. volts d. wattsarrow_forwardHow much voltage will be dropped across a 40-kΩ resistance whose current is 250 μA?arrow_forward
- How do you connect an ammeter to determine the current in a resistor? How do you connect a voltmeter to determine the voltage in a resistor?arrow_forward2. A wire with a resistance of 65 ohms has a length of 125 ft. The wire is stretch uniformly to 150 ft. What will be its resistance?arrow_forwardThe resistance of a 25-ohm resistor increases by 10 percent when its operating temperature increases from 15 to 50°C. Calculate the mean temperature rise of the resistor from an ambient temperature when its resistance is 30 ohms and the temperature coefficient remains constant.arrow_forward
- Can you Solve for the voltage of the 40-ohm resistor.arrow_forwardA battery with an internal resistance of r and an emf of 10.00 V is connected to a resistor. What is the final current? Is it half, a fourth, or a third of the original current?arrow_forwardQuestion: Given a 6.8k 5% resistors, in what range can the actual value of the resistance be and the resistor still be within the 5% tolerance? My Comments: What does this mean? I know that 6.8k means 6,800 kilo-ohms, but I don't understand the 5% tolerance part.arrow_forward
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