1 .
120 volt house current is to be transformed down to 12 volts. If the input current (RMS) is 1.5 amps then the output current is [Hint ]
2 .
A transformer takes 10 volts and 5 amps and changes it to 150 volts. What is the power output of the transformer? [Hint ]
3 .
A transformer has 150 turns on the primary and 20 on the secondary. 100 volts and 10 amps will be changed to [Hint ]
4 .
50 kW are to be transmitted over wires with a resistance of 1.8 ohms at 300 volts. What is the power loss in the wires? [Hint ]
5 .
50 kW are to be transmitted over wires with a resistance of 1.8 ohms at 30000 volts. What is the power loss in the wires? [Hint ]
6 .
[Hint ]
7 .
If the wavelength of the wave in the above question is 3x10-5 m the wave is [Hint ]
8 .
If the wavelength of the wave in question 6 is 3 nm the wave is [Hint ]
9 .
If the wavelength of the wave in question 6 is 0.6 microns the wave is [Hint ]
10 .
If the wavelength of the wave in question 6 is 10 km the wave is [Hint ]
11 .
In the figure an electromagnetic wave is shown moving left to right. If the number in the upper right is the time measured in units of 100ps the wave is a
[Hint ]
12 .
What is the wavelength of wave in question 11? [Hint ]
13 .
If the time counter in question 11 is clicking time in units of 0.2fs the wave is [Hint ]
14 .
The wavelength of the wave in question 13 is [Hint ]
15 .
If the counter in question 13 is counting in seconds the wave is [Hint ]
