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Electronics/Compound circuits


Fig 1
Fig 1  
need help to answer following questions

1 Calculate the voltage across 330Ω          2 Calculate current drawn from the supply          3 Calculate the value of R          4 Power dissipated in 100 Ω          5 Voltage drop in 68 Ω

We don't do homework problems but will give you advice on how to proceed.

This circuit is to test your knowledge or ohms law, parallel and series resistance and power dissipation.

By knowing the current in the 680 ohm resistor you can calculate the voltage drop; then you can calculate the current through the parallel 330 ohm resistor.

Then, you will know the current through R, which is the sum of the two currents.

If you then find the equiv of (68 +39)||100 you know the current and therefore you can determine the voltage at point C.  Thus you know enough to compute any other condition necssary.

Hope this helps you with any solution you need.  


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Graduate electrical engineer with over 40 years in electronic design, manufacturing, project organization and patent review. Experience in fields of industrial and consumer electronics (audio, video, acoustics, etc.)

IEEE (Institute of Electrical and Electronics Engineers); Senior Life member AES (Audio Engineering Society), Fellow Life member

BSEE University of North Dakota

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