Questions and answers for exam Preparation

MCQs

Total Questions : 480 | Page 17 of 48 pages

Question 161. Which one of the following statements best applies to a series RLC circuit?

The voltage waveform for each component always has the same amplitude and phase as the applied voltage
The current waveform for each component always has the same amplitude and phase as the applied current
All of the above
The sum of the current is always less than the applied current
None of the above

Discuss Question

Answer: Option B. -> The current waveform for each component always has the same amplitude and phase as the applied current

Question 162. When applying a square waveform to a capacitor, the circuit tends to:

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Answer: Option B. -> peak the current and round off the voltage waveforms

Question 163. Which one of the following properties of a magnetic circuit can be directly compared to current in an electrical circuit?

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Answer: Option A. -> Number of lines of force

Question 164. Who invented the first junction transistor?

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Answer: Option D. -> Shockley

Question 165. When a series RLC circuit is operating at its resonant frequency:

capacitive reactance is greater than the inductive reactance
inductive reactance is greater than the capacitive reactance
inductive reactance is equal to the capacitive reactance
the difference between inductive and capacitive reactance is equal to the resistance
None of the above

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Answer: Option C. -> inductive reactance is equal to the capacitive reactance

Question 166. Which one of the following principles best describes the basic operation of an electromagnet?

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Answer: Option C. -> Current flowing through a conductor generates a magnetic field

Question 167. The transistor has a collector current of 2 mA. If the current gain is 135, what is the base current?

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Answer: Option A. -> 14.8 µA

Question 168. Silicon atoms combine into an orderly pattern called a

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Answer: Option A. -> Crystal

Question 169. Current and voltage are said to be in phase when:

their waveforms are both ac or both dc
they have the same amplitude and frequency
their waveforms cross through zero and reach positive and negative peaks at the same time
All of the above
None of the above

Discuss Question

Answer: Option C. -> their waveforms cross through zero and reach positive and negative peaks at the same time

Question 170. The rotating coil of wire in an electric motor is called the: