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1. The temperature coefficient of resistivity of a wire is 0.001 1/K, the resistance at 300K is 200 Ohms. The wire is stretched so that it is 2X longer than it was, and the cross sectional area is 1/2 of what it was (Volume L x A is therefore constant). The stretching causes it to heat up by 150K. What is the resistance of the wire after it has been stretched?

2. How much power does a 100 Ohm resistor dissipate if it has a potential drop of 3.00V across it?

3. What is the current in the above resistor?

4. A neutral (uncharged) capacitor has a charge of -3.00C moved from one of the plates to another in a time of 5.00 sec, leaving +3.00C on 1st plate. The +charges don't move, only the electrons. What was the average current?

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