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Computer science Practice Questions & Answers

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The emitter diode is usually

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The emitter diode is usually

A).  Forward-biased

B).  Reverse-biased

C).  Nonconducting

D).  Operating in the breakdwon region

E).  None of the above

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A circuit has two different voltage sources that are connected in a series-opposing form. If the sources are rated at 6 V and 9 V, what is the total source voltage?

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A circuit has two different voltage sources that are connected in a series-opposing form. If the sources are rated at 6 V and 9 V, what is the total source voltage?

A).  3 V

B).  16 V

C).  7.5 V

D).  8 V

E).  None of the above

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How many protons does the nucleus of a silicon atom contain?

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How many protons does the nucleus of a silicon atom contain?

A).  4

B).  29

C).  14

D).  48

E).  None of the above

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Which one of the following statements is true?

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Which one of the following statements is true?

A).  The secondary voltage for a step-down power transformer is greater than the primary voltage

B).  The secondary current for a step-down power transformer is greater than the primary voltage

C).  Parallel RLC circuit operated below its resonant frequency

D).  purely resistive circuit

E).  None of the above

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An audio transformer has a turn ratio of 9, What is its impedance ratio?

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An audio transformer has a turn ratio of 9, What is its impedance ratio?

A).  81

B).  85

C).  6

D).  9

E).  None of the above