General Electrical Study Guide Flashcards

1
Q

The working voltage of a capacitor in an AC circuit should be what?

A

At least 50 percent greater than the highest applied voltage.

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2
Q

The term that describes the combined resistive forces in an AC circuit is what?

A

Impedance.

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3
Q

What is the opposition to the flow of AC produced by an electromagnetic field (EMF) with generated back voltage called?

A

Inductive reactance.

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4
Q

Electrostatic fields are also known as what?

A

Dielectric fields.

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5
Q

The basis for transformer operation in the use of alternating current is mutual what?

A

Inductance.

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6
Q

The opposition offered by a coil to the flow of alternating current (ignoring resistance) is called.

A

Inductive reactance.

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7
Q

What factors strengthen a coil inductor?

A

Adding coils close together.

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8
Q

An increase in which of the following factors will cause an increase in the inductive reactance of a circuit?

A

Inductance and frequency.

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9
Q

(Refer to Figure 1) When different rated capacitors are connected in series in a circuit, the total capacitance is what?

A

Less than the capacitance of the lowest rated capacitor.

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10
Q

Capacitors are sometimes used in DC circuits to what?

A

Smooth at slight pulsations in current/voltage.

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11
Q

In an AC circuit, the effective voltage is what?

A

Less than the maximum instantaneous voltage.

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12
Q

The amount of electricity a capacitor can store is directly proportional to the what?

A

Plate area and inversely proportional to the distance between the plates.

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13
Q

What is the total capacitance of a certain circuit containing three capacitors with capacitances of .02 microfarad, .05 microfarad, and .10 microfarad, respectively?

A

0.0125 microfarad.

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14
Q

What is the total capacitance of a circuit containing three capacitors in parallel with capacitances of .02 microfarad, .05 microfarad, .10 microfarad, respectively?

A

.170 microfarad.

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15
Q

Unless otherwise specified, any values given for current or voltage in an AC circuit are assumed to be what?

A

Effective values.

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16
Q

When different capacitors are connected in parallel in a circuit, the total capacitance is what?

A