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Phys 313 Quiz 15

Question 1

What are the SI units of power? 

   Answer:  watts = Joules/sec

Question 2

The Electric Company transmits 5 MW, using high voltage lines at 100,000 volts. What is the current through the lines?

  1. 0.05 A
  2. 500 A
  3. 50 A 
   Answer:    50 A

Question 3

The transmission wires have resistance 1 ohm. How much power is lost due to heating the wires?

  1. 2500 W
  2. 5,000,000 W
  3. 10,000,000,000 W 

   Answer:    2500 W

Creative Commons License Copyright © Michael Richmond. This work is licensed under a Creative Commons License.