ELECTRICITY FOR TRADES
3rd Edition
ISBN: 9780078118630
Author: Petruzella
Publisher: RENT MCG
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Textbook Question
Chapter 7.2, Problem 15RQ
Assume that applying 120 volts to a resistive load results in a current flow of 10 amperes. What will the value of the current flow be if:
- a. The voltage is increased to 240 V?
- b. The voltage is decreased to 60 V?
- c. The load resistance is doubled?
- d. The load resistance is halved?
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Chapter 7 Solutions
ELECTRICITY FOR TRADES
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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- Problem 2 A transfer function is shown in the Bode plot below, which can be expressed as: Vo(s) Ks Vi(s) (s² + swo/Q + w) (TS + 1) (log scale) Slope =+1 Determine the parameters K, Q, 000, and t. k 5 1 Slope = -1 Slope = -2 10 @ rad/s (log scale)arrow_forwardH.W.2 For the circuit shown, determine the feedback topology & determine Ave, Rif, Rof 3K 300 R 1.2K Vo hfe=50 www 1.2K hie=1.1k.ohm RE₂=50arrow_forwardProblem 1 We would like to build an AM radio receiver using a series RLC circuit to act as a bandpass filter as shown in the figure below. We have decided to use a 500 μH inductor, 25 Q resistor, and a variable capacitor whose capacitance can be adjusted between 20 and 150 pF. A radio “tunes” into a certain frequency by adjusting its receiver circuit so that it resonates at a specific center frequency with some amount of bandwidth. + vi(t) 1. Determine the range of channel frequencies that we can tune into with this receiver. 2. Determine the receiver's bandwidth. 3. AM radio broadcasting has assigned channels, which range from 540 kHz to 1700 kHz spaced at 10-kHz intervals. What is the largest value of the internal resistance R that would allow us to avoid adjacent channel interference (i.e., listening to more than one channel at once)? For simplicity, assume that the bandwidth of the RLC circuit is symmetric around the resonance frequency, and the bandwidth is what determines whether…arrow_forward
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