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juin [17]
2 years ago
8

A 2.0-ohm resistor is connected in a series with a 20.0 -V battery and a three-branch parallel network with branches whose resis

tance are 8.0 ohms each. Ignoring the battery’s internal resistance, what is the current in the batter? Show your work.
Physics
1 answer:
Llana [10]2 years ago
4 0

Answer:

Explanation:

Resolving the parallel resistor branches

\frac{1}{Rtotal} =\frac{1}{8.0ohm} +\frac{1}{8.0ohm} +\frac{1}{8.0ohm} =2.67Ohm

The equivalent resistor is now in series with the 2.0 Ohm resistor

so, by using Ohm's Law

I=\frac{V}{Rtotal+R} \\I=\frac{20.0V}{2.67Ohm+2.0Ohm} \\\\I= 4.28A

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A LED light source contains a 0.5-Watts GaAs (Eg =1.43 eV) LED. Assuming that 0.12% of the electric energy is converted to emiss
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Answer:

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b ) spectral width in terms of wavelength = 30 nm

frequency width = ?

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I = I₀ x 10⁵

= 10⁻¹² x 10⁵

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