Warming up on Kirchoff's Laws

This assignment is due before 9 AM, Wednesday, October 11th, 2000.

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The following three questions refer to the material you were to read in preparation to the lesson. Questions one and two require you to write a three or four sentence response. Number three is a multiple choice question. Click in the appropriate circle.

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1.

In the circuit to the right there are two dashed lines. Can Kirchoffs loop rule be used on either one? both?

There are also two small circles. Can Kirchoffs junction rule be applied at one or both of these locations?

How many possible loops and jucntions can you spot in this circuit?





2.

A 1 mF capacitor is charged up to 1000 V and then allowed to discharge through a 100 k resistor. Estimate how long it takes before the voltage across the capacitor has dropped to a safe value. Note: this is why you should NOT poke around inside a TV set if you do not know what you are doing.





3.

Consider a circuit like the one shown. A long time after the switch is thrown, the capacitor will have an (approximately) constant charge (Q) and voltage (V). If the value of the resistor is increased, which of the following statements is true?

Q will be less, but V will be unaffected.

V will be less, but Q will be unaffected.

Q and V will both be less.

Neither Q nor V will be affected at all.

V will be less but Q will be greater.

Q will be less but V will be greater.

Both Q and V will be greater.

Below is a space for your thoughts, including general comments about today's assignment. What was hard or confusing (or cool)? What would you like to spend extra time on in class? Do you see how this subject fits in with the others we have discussed?




You may change your mind as often as you wish. When you are satisfied with your responses click the SUBMIT button.

I received no help from anyone on this assignment.



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