Delmar's Standard Textbook Of Electricity
7th Edition
ISBN: 9781337900348
Author: Stephen L. Herman
Publisher: Cengage Learning
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Textbook Question
Chapter 2, Problem 13RQ
Is it less expensive to operate the electric heating unit in Question 12 on 240 V or 120V?
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CIRCUIT. Answer only
Heater A and Heater B are in parallel across a 110 volt supply. If the total power of the two heaters is 2,250 watts and heater A takes one half as much power as heater B. What is the resistance of B?
a.
16.13 ohms
b.
14.08 ohms
c.
12.01 ohms
d.
8.067 ohms
What is the current in amperes in a 3-phase circuit when the load is 135 horsepower, the efficiency is 90%, the voltage is 440 volts, and the circuit power factor is 0.80? Round the answer to the nearer hundredth.
Two 115-V incandescent lamps A & B are connected in series across 230-V de source.
Lamp A is rated 100 W and lamp B is rated 60 W. Which lamp is abnormally bright
and hence will burn out soon?
a) Lamp A
b) Lamp B
c) Both lamps will be abnormally bright
d) Both lamps will work normally
Chapter 2 Solutions
Delmar's Standard Textbook Of Electricity
Ch. 2 - What is a coulomb?Ch. 2 - What is an ampere?Ch. 2 - Define voltage.Ch. 2 - Define ohm.Ch. 2 - Define watt.Ch. 2 - An electric heating element has a resistance of 16...Ch. 2 - How many watts of heat are being produced by the...Ch. 2 - A 240-V circuit has a current flow of 20 A. How...Ch. 2 - A 240-V circuit has a current flow of 20 A. How...Ch. 2 - A 240-V air-conditioning compressor has an...
Ch. 2 - Prob. 11RQCh. 2 - A 5-kW electric heating unit is connected to a...Ch. 2 - Is it less expensive to operate the electric...Ch. 2 - 14. Is it less expensive to operate the electric...Ch. 2 - You are an electrician on the job. The electrical...Ch. 2 - You have been sent to a new home. The homeowner...Ch. 2 - You are an electrician installing the wiring in a...Ch. 2 - A homeowner is installing a swimming pool. You...Ch. 2 - A homeowner is installing a swimming pool. You...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.Similar questions
- Two 115-V incandescent lamps A & B are connected in series across 230-V dc source. Lamp A is rated 100 W and lamp B is rated 60 W. Which lamp is abnormally bright and hence will burn out soon? a) Lamp A b) Lamp B c) Both lamps will be abnormally bright d) Both lamps will work normally O a. Lamp A O b. Lamp B O c. Both lamps will be abnormally bright O d. Both lamps will work normallyarrow_forwardThe hot water for the heating system for a small factory is supplied by a single boiler. The bolier is locatd in a small building separate form the factory. The power supplied to the bioler is 240-volt single-phase without a netural conductor. At the present time, the small building housing the bioler has no inside lighting. The business owner desires that four 100-watt lamps be installed inside the building. All lamps are to be connected to a single switch. The lamps are to be connected to the present 240-volt sercvice inside the building. How would you accomplish this task? Explain your answer.arrow_forwardNo matter how much you try to adjust the voltage knob, voltage cannot be set when attempting to reach a DC power supply of 12VDC. What are the possible solutions to this problem?arrow_forward
- For the subtractor, if V2 equals 5 volts DC, and V1 is 4 volts DC, then the O/P is .A The answer is 4 volts DC B The answer is 9 volts DC The answer is 1 volt DC .D The answer is 5 volts DCarrow_forwardWe want to measure the amount of current flowing to an old light bulb. We expect that the result will be around 5A. How should we connect the probes of the multimeter? Drag the connector images to the correct locations and "Not Connected" images to the rest. SUDE SWITCH: LEFT- OFF MIDDLE- DCVOLTS DC mA NUMERICAL VALUE OF VOLTS OR mA OR OHMS DISPLAYED HERE 0.00 OHMS RIGHT - AC VOLTS AC mA OFFOD AC DC-A DM 8010 MOVE ROTARY SWITCH TO THIS AREA TO READ OHMS 1000 200 20 MOVE ROTARY SWITCH TO THIS AREA TO READ VOLTS (SELECT RANGE) 200 (SELECT RANGE) 2K. 20K. •200 20u MOVE ROTARY SWITCH TO THIS AREA TOo READ mA (SELECT RANGE) 200K 20u *200u m 2M 20M 200m 20m 10A COM vn PROBES Windows'u Etkinleştir Windows'u etkinleştirmek için Ayarlar'a gidin. NOT CONNECTEDarrow_forwardI have a 230/460 volt motor, rated 1140 rpm at 60 hz. can you please tell me the number of poles and the rated KW? thanksarrow_forward
- How does the magnitude of the voltage across the power supply compare to the voltage across the bulb with the switch open? How do they compare with the switch closed?arrow_forwardHow is the total load in volt-amperes for lighting purposes determined? See NEC 220.12 __________arrow_forwardWhat will happen to the fan if the rating of the fuse is 4A? Explain How does the resistance affect the speed of the fan?arrow_forward
- Question 4 Not yet answered Marked out of 1.00 P Flag question The power input to a 400 volt, 50HZ, 3 phase motor is measured by two wattmeters which indicate 300 KW and 10KW respectively. The power factor is O a. 1 O b. 1 kw O c. 0.86 kw O d. 0.86arrow_forward81arrow_forwardT bac 79. Which of the following formulas can be used with Ohm's law to determine the amount of voltage necessary to push ampere of current through ohms of resistance? a. E=IXR E = 0.8 AX 6 E = 4.8 V b. C. d. XL = 2 π fL 1 = XL X₁₁ = X₁₁ + X₁₂ + X₁3 80. A ceiling fan has a light kit attached to the fan. What type of load is the light kit? a. power b. capacitivearrow_forward
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