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Constants and Conversions. Need a calculator? Make sure to enter your answers in the specified units, but do not include the units in your answer.
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1) If billion electrons flow past a point in 3 s, what is the current? (express your answer in scientific notation to 2 decimal places,i.e., .00123 would be 1.23e-3)

2) In a circuit carrying A, how many electrons pass any point in the circuit in 10 seconds? (Use scientific to 2 decimal places.)

3) What is the diameter (to the nearest tenth of a mm) of a tungsten wire that has the same resistance as a copper of the same length and a diameter on mm.

4) A power station delivers 520 kW of power to a factory through wires that have a total resistance of 3 ohms.How much less power is wasted, to the nearest hundredth of a kW, if the power is delivered at kW rather than 12 kW?

5) A light bulb is rated at watts when it is connected to a 100 volt battery. To the nearest tenth of a watt what is its power when connected to a 50 volt battery?

6) In the previous problem, what is the resistance to the nearest ohm of the bulb?

7) To the nearest tenth of a volt, what is the voltage of a battery that delivers 1.2 A to a ohm resistor?

8) If the resistance in the previous problem is solely due to the resistance of a 2 mm thick copper wire, to the nearest meter how long is the wire?

9) A AC voltage with peak volts is applied across a 500 ohm resistor. To the nearest tenth of a watt what is the average power?
10) In the previous problem what would be the rms current to the nearest hundredth of a decimal place?