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3 years ago

10

Calculate the current in the 8-W resistor of Figure below by using Thevenin’s theorem. What will be its value of connections of

6V battery are reversed

1 answer:

kvv77 [185]3 years ago

7 0

solution from c hegg. hope it helps. see photos explanation

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Answer:

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Explanation:

I = 700

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we first calculate the rate of heat that is being transferred by the current

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q = 700²(6x10⁻⁴)

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we calculate the surface temperature

Ts = T∞ + $\frac{q}{h\pi Di}$

Ts = $30+\frac{294}{25*\frac{22}{7}*\frac{5}{1000} }$

$Ts=30+\frac{294}{0.3928} \\$

$Ts =30+748.4\\Ts = 778.4$

The surface temperature is therefore 778.4°C if the cable is bare

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