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4 years ago

Use a delta-star conversion to simplify the delta BCD (40 , 16 , and 8 ) in the

Engineering

1 answer:

Sladkaya [172]4 years ago

7 0

Answer:

Current, I = 4A

Explanation:

Since the connection is in delta, let's convert to star.

Simplify BCD:

$R1 = \frac{40 * 8}{40 + 16 + 8} = \frac{320}{64} = 5 ohms$

$R2 = \frac{16 * 8}{40 + 16 + 8} = \frac{128}{64} = 2 ohms$

$R3 = \frac{40 * 16}{40 + 16 + 8} = \frac{640}{64} = 10 ohms$

From figure B, it can be seen that 6 ohms and 6 ohms are connected in parallel.

Simplify:

$\frac{6 * 6}{6 + 6} = \frac{36}{12} = 3 \ohms$

Req = 10 ohms + 3 ohms

Req = 13 ohms

To find the current, use ohms law.

V = IR

Where, V = 52volts and I = 13 ohms

Solve for I,

$I = \frac{V}{R} = \frac{52}{13} = 4A$

Current, I = 4 A

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3 years ago

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4 years ago

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The conditions at the beginning of compression in an Otto engine operating on hot-air standard with k=1.35 and 101.325 kPa, 0.05

Katyanochek1 [597]

Answer:

$P_m=181.42 KPa$

Explanation:

$P_1=101.325 KPa,V_1=0.05m^3,T_1=32C$ ,K=1.35

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Heat added=15 KJ

We know that compression ratio $r=1+\dfrac{1}{C}$

$r=1+\dfrac{1}{0.08}$

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$\eta =0.56$

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$0.56 =\dfrac{W}{15}$

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We know that Work =Mean effective pressure x swept volume.

Here swept volume $V_s=V_1-V_2$

$V_s=0.05-3.7\times 10^{-3}$

$V_s=0.0463 m^3$

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3 years ago

The heat transfer rate per unit area in a thermal circuit is equivalent to what quantity in an electric circuit? A. voltage B. c

balu736 [363]

Answer:

A. voltage

Explanation:

The rate of heat transfer per unit area in a thermal circuit is equivalent to the voltage in an electrical circuit.

This is because, within an electrical circuit the voltage is supplied by a generator, which can be batteries, batteries, or others. The moment the electrical voltage acts within a circuit, it will consist of the gradient of electrical potential between two points, which will cause the electrons to move from the point with the highest concentration to the point with the lowest concentration (similar to the transfer of heat from the thermal circuit) generating the electric current.

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3 years ago

what is called periodic function give example? Plot the output which is started with zero degree for one coil rotating in the un

marta [7]

Answer:

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3 years ago