DELMAR'S STANDARD TEXT OF ELECTRICITY
6th Edition
ISBN: 9780357323380
Author: Herman
Publisher: CENGAGE C
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Chapter 8, Problem 4PA
The 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.
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-E1 + VR1 + VR4 – E2 + VR3 = 0 -------> Loop 1 (a)
R1(I1) + R4(I1 – I2) + R3(I1) = E1 + E2 ------> Loop 1 (b)
R1(I1) + R4(I1) - R4(I2) + R3(I1) = E1 + E2 ------> Loop 1 (c)
(R1 + R3 + R4) (I1) - R4(I2) = E1 + E2 ------> Loop 1 (d)
Now that we have loop 1 equation will procced on finding the equation of I2 current loop. However, a reminder that because we are going in a clockwise direction, it goes against the direction of the current. As such we will get an equation for the matrix that will be:
E2 – VR4 – VR2 + E3 = 0 ------> Loop 2 (a)
-R4(I2 – I1) -R2(I2) = -E2 – E3 ------> Loop 2 (b)
-R4(I2) + R4(I1) - R2(I2) = -E2 – E3 -----> Loop 2 (c)
R4(I1) – (R4 + R2)(I2) = -E2 – E3 -----> Loop 2 (d)
These two equations will be implemented to the matrix formula I = inv(A) * b
R11 R12
(R1 + R3 + R4)
-R4
-R4
R4 + R2
Chapter 8 Solutions
DELMAR'S STANDARD TEXT OF ELECTRICITY
Ch. 8 - Referto Figure 8-2. Replace the values shown with...Ch. 8 - 2. Refer to Figure 8-5. Replace the values shown...Ch. 8 - 3. Refer to the circuit shown in Figure 8-2....Ch. 8 - Refer to the circuit shown in Figure 6-22. The...Ch. 8 - Refer to Figure 8-21. Assume that the resistors...Ch. 8 - A circuit contains a 1000- and a 300- resistor...Ch. 8 - Two resistors are connected in series. One...Ch. 8 - A single-phase electric motor is connected to a...Ch. 8 - The hot water for the heating system for a small...Ch. 8 - Find the unknown values in the circuit if the...
Ch. 8 - Refer to the circuit shown in Figure 8-21 to solve...Ch. 8 - 3. Find the unknown values in the circuit if the...Ch. 8 - Refer to the circuit shown in Figure 8-25 to solve...Ch. 8 - 5. Find the unknown values in the circuit if the...Ch. 8 - Find the unknown values in the circuit if the...Ch. 8 - Refer to the circuit shown in Figure 8-26 to solve...Ch. 8 - ET E1 E2 E3 E41.248V IT I1 I2 I3 I4 RT R1 R2 R3 R4...Ch. 8 - Find the missing values for the circuit shown in...Ch. 8 - Find the missing values for the circuit shown in...
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