Electrical Engineering

Question: If a sine wave goes through 10 cycles in 20 s, the period is [A]. 20 s [B]. 4 s [C]. 2 s [D]. 100 s Answer: Option C Explanation: No answer description available for this question.

Question: A signal with a 400 s period has a frequency of [A]. 250 Hz [B]. 2,500 Hz [C]. 25,000 Hz [D]. 400 Hz Answer: Option B Explanation: No answer description available for this question.

Question: A pulse waveform has a high time of 8 ms and a pulse width of 32 ms. The duty cycle is [A]. 25% [B]. 50% [C]. 1% [D]. 100% Answer: Option A Explanation: No answer description available for this question.

Question: A 20 kHz pulse waveform consists of pulses that are 15 s wide. The duty cycle [A]. is 1% [B]. is 30% [C]. is 100% [D]. cannot be determined Answer: Option B Explanation: No answer description available for this question.

Question: 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 Answer: Option B Explanation: No answer description available for this question.

Question: If the rms current through a 4.7 k resistor is 4 mA, the peak voltage drop across the resistor is [A]. 4 V [B]. 18.8 V [C]. 26.6 V [D]. 2.66 V Answer: Option C Explanation: No answer description available for this question.

Question: If the rms current through a 6.8 k resistor is 8 mA, the rms voltage drop across the resistor is [A]. 5.44 V [B]. 54.4 V [C]. 7.07 V [D]. 8 V Answer: Option B Explanation: No answer description available for this question.

Question: 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]. 0° [B]. 45° [C]. 40° [D]. none of the above Answer: Option C Explanation: No answer description available for this question.

Question: The average half-cycle value of a sine wave with a 40 V peak is [A]. 25.48 V [B]. 6.37 V [C]. 14.14 V [D]. 50.96 V Answer: Option A Explanation: No answer description available for this question.

Question: The average value of a 12 V peak sine wave over one complete cycle is [A]. 0 V [B]. 1.27 V [C]. 7.64 V [D]. 6.37 V Answer: Option A Explanation: No answer description available for this question.