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

10 mA
14 mA
None of these
12 mA
11 mA

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Electronic Principles
The rms value of a sine waveform is:

the number of cycles completed in one second
the time required to complete one full cycle
equal to 1.41 times the peak amplitude
None of these
equal to 0.707 times the peak amplitude

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Electronic Principles
Which one of the following statements is true for the currents in a parallel RC circuit?

None of these
The current always has the same amplitude and phase for every part of the circuit
The total current is less than the sum of the currents for the resistance and capacitance
The total current. is greater than the sum of the currents for the resistance and capacitance
The total current is equal to the sum of the currents for the resistance and capacitance

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Electronic Principles
Which one of the following statements is true for the impedance of a series RC circuit?

The impedance is less than the sum of the resistance and capacitive reactance
The impedance is greater than the sum of the resistance and capacitive reactance
The impedance is equal to the sum of the resistance and capacitive reactance
None of these
The impedance is greater than either the resistance or capacitive reactance but less than their sum

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Electronic Principles
Which one of the following phrasers best describes flux density?

The force that maintains lines of force
The rate of change of the number of lines of magnetic force
The opposition to a build-up of magnetic fields
The concentration of lines of magnetic force
None of these

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