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Electronic Principles

Electronic Principles
A step-up transformer has a turns ratio of 1:4. If the line voltage is 115 V rms, what is the peak secondary voltage?

208 V
700 V
651 V
707 V
None of these

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Electronic Principles
An ideal voltage source has

None of these
Zero internal resistance
A load dependent voltage
Infinite internal resistance
A load-dependent current

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Electronic Principles
Doubling the operating frequency of an inductive circuit:

multiplies the inductive reactance by 6.28
cuts the inductive reactance in half
None of these
has no effect on the inductive reactance
doubles the amount of inductive reactance

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Electronic Principles
Positive ions are atoms that have

Lost an electron
Gained an electron
Lost a proton
None of these
Gained a proton

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Electronic Principles
In a step-down transformer, which is larger?

Secondary voltage
None of these
Primary voltage
Neither
Impossible to say

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Electronic Principles
Two diodes are in series. The first diode has a voltage of 0.75 V and the second has a voltage of 0.8 V. If the current through the first diode is 500 mA, what is the current through the second diode

12 mA
11 mA
14 mA
10 mA
None of these

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