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Electrical Engineering - Alternating Current and Voltage


Exercise

"Everyone is wise until he speaks."
- (Proverb)
1. 

If the rms voltage drop across a 15 k resistor is 16 V, the peak current through the resistor is

A. 15 mA
B. 1.5 mA
C. 10 mA
D. 1 mA

2. 

The conductive loop on the rotor of a simple two-pole, single-phase generator rotates at a rate of 400 rps. The frequency of the induced output voltage is

A. 40 Hz
B. 100 Hz
C. 400 Hz
D. indeterminable

3. 

How many degrees are there in /3 rad?

A. B. 60°
C. 180°D. 27°

4. 

To produce an 800 Hz sine wave, a four-pole generator must be operated at

A. 200 rps
B. 400 rps
C. 800 rps
D. 1,600 rps

5. 

One sine wave has a positive-going zero crossing at 15° and another sine wave has a positive-going zero crossing at 55°. The phase angle between the two waveforms is

A.
B. 45°
C. 40°
D. none of the above




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