ELECTRONIC PRINCIPLES QUIZ

Doubling the number of turns of wire in an inductor:

reduces the value of inductance by one-half

None of these

reduces the value of inductance by one-fourth

multiplies the value of inductance by four

multiplies the value of inductance by two

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Which one of the following is a statement of KirchhofFs voltage law?

The algebraic sum of voltages entering and leaving a point is equal to zero

None of these

The voltage drop across a resistance is proportional to the value of resistance and the amount of current flowing through it

The total voltage in a parallel circuit is less than the value of the smallest voltage

The algebraic sum of voltages in a loop is equal to zero

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Which one of the following properties of a magnetic circuit can be directly compared to current in an electrical circuit?

Flux density

Reluctance

None of these

Magnetomotive force

Number of lines of force

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What form of energy is used for creating static electricity?

Chemical energy

None of these

Light energy

Solar energy

Mechanical energy

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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

None of these

The total voltage is equal to 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

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

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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?

20 W

200 W

None of these

1000 W

100 W

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The total capacitive reactance of a parallel capacitor circuit is:

equal to the sum of the individual capacitive-reactance values

equal to the source voltage divided by total current

less than the capacitance value of the smallest capacitor

None of these

equal to the sum of the individual capacitance values

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Which one of the following devices is most often used for measuring electrical potential difference?

Ohmmeter

None of these

Wattmeter

Ammeter

Voltmeter

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A device that converts thermal energy to electrical energy is called a:

chemical cell

piezoelectric devices

solar cell

None of these

thermocouple

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Which one of the following kinds of materials has the highest permeability?

All of these

A diamagnetic material

None of these

A ferromagnetic material

A paramagnetic material

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