ELECTRONIC PRINCIPLES QUIZ

The merging of a free electron and a hole is called

None of these

Recombination

Lifetime

Thermal energy

Covalent bonding

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Voltage is

The smallest electrically charged particle

The number of free electrons in an atom

The flow of charged particles through a material

None of these

Trie force that causes electrons to flow

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Assuming 100% efficiency, what is the power being applied to the primary winding of the transformer described in the above question?

100 W

200 W

20 W

None of these

1000 W

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A transistor has a current gain of 125 and a base current of 30 ÂµA. What is the collector current?

3.75 mA

None of these

13 mA

0.05 mA

3.2 mA

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The net charge of a neutral copper atom is

1

-1

4

None of these

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For normal operation of the transistor, the collector diode has to be

Forward-biased

Nonconducting

None of these

Operating in the breakdown region

Reverse-biased

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Which one of the following statements is true for the voltage in a parallel RC circuit?

The total voltage is less than the sum of the voltages across the resistance and capacitance

The voltage always has the same amplitude and phase for every part of the circuit

None of these

The total voltage leads the total current by less than 90 degree

The total voltage is equal to the sum of the voltages across the resistance and capacitance

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An unloaded zener regulator has a source voltage of 20 V, a series resistance of 330 W, and a zener voltage of 12 V, What is the Zener current?

68.4 mA

None of these

28.4 mA

34.4 mA

24.2 mA

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Which one of the following statements best applies to a parallel RLC circuit?

All of these

The sum of the current is always less than the applied current

None of these

The current waveform for each component always has the same amplitude and phase as the applied current

The voltage waveform for each component always has the same amplitude and phase as the applied voltage

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The component that forms the electrical connection between the rotating coil of wire in a motor and the external source of electrical energy is called the:

None of these

armature

rotor

battery

commutator

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