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

10.3 µA
None of these
14.8 µA
7.75 µA
7.8 µA

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Electronic Principles
The total capacitance of a series capacitor circuit is:

equal to the sum of the individual capacitance values
equal to the sun of the individual capacitive-reactance values
less than the value of the smallest capacitor
None of these
equal to the source voltage divided by total current

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Electronic Principles
Which one of the following statements is true for voltage in a series circuit?

The total voltage in a series circuit is always less than the value of the smallest voltage
The total voltage is equal to the sum of the individual voltages in a series circuit
The total voltage of a series circuit is equal to the total current divided by the total resistance
The total voltage in a series circuit is equal to the average value of the individual voltages
None of these

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Electronic Principles
The south pole of a magnet is the one:

None of these
that would be attracted to the earth's south magnetic pole
that would be repelled by the north pole of another magnet
that would be attracted to the earths north magnetic pole
that has its molecules arranged in a random pattern

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Electronic Principles
The core of an electromagnet is said to be in saturation when:

the core is permitted to move freely within the coil
changing the polarity of the current in the coil changes the polarity of the magnetic field around the core
an increase in current through the coil causes no further increase in the mmf
frequent changes in the direction of current through the coil causes heating effects in the core material
None of these

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