Questions and answers for exam Preparation

MCQs

Total Questions : 227 | Page 17 of 23 pages

Question 161. At cut off, the Q point is at

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Answer: Option C. -> lower end of the load line

Question 162. Which one of the following statements is true for voltage in a parallel circuit?

The total voltage in a parallel circuit is equal to the average value of the individual voltages
None of these
The total voltage is equal to the sum of the voltages across the individual branches in a parallel circuit
The total voltage in a parallel circuit is always less than the value of the smallest voltage
The total voltage of a parallel circuit is the same as the voltages across each branch

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Answer: Option E. -> The total voltage of a parallel circuit is the same as the voltages across each branch

Question 163. The south pole of a magnet is the one:

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Answer: Option E. -> that has its molecules arranged in a random pattern

Question 164. Absolute Zero temperature equals

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Answer: Option B. -> -273o C

Question 165. The peak value of a sine waveform is:

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Answer: Option E. -> the maximum positive or negative value

Question 166. The dielectric constant of a material is a measure of:

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Answer: Option D. -> how well the material concentrates electrostatic lines of force

Question 167. Which one of the following statements applies to common auto batteries?

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Answer: Option C. -> Auto batteries are secondary wet-cell batteries

Question 168. When operating above its resonant frequency, a series RLC circuit has the characteristics of a:

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Answer: Option E. -> series RL circuit

Question 169. What is the inductive reactance of a 2-H coil operating at 60 Hz?

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Answer: Option E. -> 754 Ohm

Question 170. What is the primary difference between primary and secondary cell batteries?

Primary-cell batteries use chemical cells, whereas secondary-cell batteries use an alternative energy source, such as thermal or magnetic energy, to supplement their outputs
Primary-cell batteries must be recharged at a much slower rate that secondary-cell batteries
Primary-cell batteries can be recharged and used many times, whereas secondary-cell batteries cannot be properly recharged
None of these
Secondary-cell batteries can be recharged and used many times, whereas primary-cell batteries cannot be properly recharged

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Answer: Option E. -> Secondary-cell batteries can be recharged and used many times, whereas primary-cell batteries cannot be properly recharged