Which one of the following statements most accurately applies to the frequency of a waveform?
A. The actual frequency of a sine waveform is 1.41 times the working frequency
B. Unless specified otherwise, the frequency of a waveform is assumed to be 60 Hz
C. The higher the amplitude of a waveform, the higher its frequency
D. The longer the period of a waveform, the lower its frequency
E. None of the above
Answer: Option A
This Question Belongs to Computer Science >> Electronic Principles
In an intrinsic semiconductor, the number of free electrons
A. Equals the number of holes
B. Is less than the number of holes
C. Is greater than the number of holes
D. Impossible to say
E. None of the above
A device that converts mechanical into electrical energy is?
A. solar cell
B. thermocouple
C. chemical cell
D. generator
E. None of the above
Which one of the following kinds of materials has the lowest permeability?
A. A diamagnetic material
B. A paramagnetic material
C. A feiTomagnetic material
D. All of the above
E. None of the above
The total impedance of a parallel RLC circuit:
A. always increases as the applied frequency increases
B. is equal to the sum of the values of resistance, inductive reactance and capacitive reactance
C. always decreases as the applied frequency increases
D. is maximum at the resonant frequency
E. None of the above
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