ELECTRIC MOTORS+CONTROLS ACTIVITIES MAN.
3rd Edition
ISBN: 9781260439380
Author: Petruzella
Publisher: MCG
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Chapter 7.2, Problem 20RQ
A 400-W 4-Ω public address speaker is to be fused for overload protection. What maximum current rating of a fuse should be used? (Hint: P = I2R.)
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Chapter 7 Solutions
ELECTRIC MOTORS+CONTROLS ACTIVITIES MAN.
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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- - What are Flip Flop circuits used for? Explain the operation of an R-S Flip Flop.- What function do Multiplexers or MUXs perform?arrow_forward- What function do Demultiplexers or DEMUX perform?- According to the implementation of automation circuits with ARDUINO boards, what would they be, Conceptually, the main components of any system of automation? Draw a representative schematic or block diagram.arrow_forwardSolve problems 5.2 in detail and thank youarrow_forward
- 5.1 Determine the three zone settings for the relay Rab in the system shown in Figure 5.26. The system nominal voltage is 138 kV, and the positive sequence impedances for the various elements are given in the figure. The transformer impedance is given in ohms as viewed from the 138 kV side. Assume that the maximum load at the relay site is 120 MVA, and select a CT ratio accordingly. The available distance relay has zone 1 and zone 2 settings from 0.2 to 10 2, and zone 3 settings from 0.5 to 40 2, in increments of 0.1 2. The angle of maximum torque can be adjusted to 75° or 80°. Remember that the zone 3 of the relay must back up the line BC, as well as the transformer. A Rab (3+j40) B (2+ j50) (0+j9) с Fu D Figure 5.26 System for problem 5.1arrow_forwardPlease solve question 4.7 in detail and thank youarrow_forwardSolve in detail to understandarrow_forward
- E2.6 Consider the following neural network. Input Sat. Linear Layer Linear Layer purelin(Wa+b) Sketch the following responses (plot the indicated variable versus p for (-3arrow_forwardE2.3 Given a two-input neuron with the following weight matrix and input vector: w=[32] and p = [-5 7], we would like to have an output of 0.5. Do you suppose that there is a combination of bias and transfer function that might allow this? i. Is there a transfer function from Table 2.1 that will do the job if the bias is zero? ii. Is there a bias that will do the job if the linear transfer function is used? If yes, what is it? iii. Is there a bias that will do the job if a log-sigmoid transfer function is used? Again, if yes, what is it? iv. Is there a bias that will do the job if a symmetrical hard limit transfer function is used? Again, if yes, what is it?arrow_forwardE2.2 Consider a single-input neuron with a bias. We would like the output to be -1 for inputs less than 3 and +1 for inputs greater than or equal to 3. i. What kind of a transfer function is required? ii. What bias would you suggest? Is your bias in any way related to the input weight? If yes, how? iii. Summarize your network by naming the transfer function and stating the bias and the weight. Draw a diagram of the network.arrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
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