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electrical second year > D-4 Analyze Single Phase AC Circuits > Flashcards

D-4 Analyze Single Phase AC Circuits Flashcards

1
Q

Impedance ( Z ) Combination of ( R ) and ( XC ) measured in ___ is total opposition to current

A

Ohms

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2
Q

True Power ( P ) is the rate of doing work and is measured in ?

A

Watts

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3
Q

Reactive Power ( Q ) Rate of which energy is stored and returned to a circuit is measured in ?

A

Vars

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4
Q

Apparent Power ( S ) combination of P & Q is measured in ?

A

VA

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5
Q

Power factor is a ratio between ___

A

adj/hypotenuse

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6
Q

Adding resistors in series will cause he total circuit resistance to ?

A

Increase

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7
Q

What is the phase relationship between current and voltage in a resistive circuit ?

A

Current is In Phase with the Voltage

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8
Q

What is the power factor of a resistive circuit ?

A

1.0 100% unity

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9
Q

What is the relationship between power and apparent power of a resistive circuit ?

A

power = apparent power

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10
Q

Adding inductors in series will cause the total circuit inductance to ?

A

Increase

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11
Q

If the inductance of a circuit is increased then the total current will?

A

Decrease

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12
Q

What is the phase relationship between current and voltage in an inductive circuit?

A

the current Lags the voltage

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13
Q

what is the power factor of a purely inductive circuit ?

A

0.0

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14
Q

relationship between reactive power (Q) and the apparent power (S) in a purely inductive circuit ?

A

reactive power = apparent power

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15
Q

Adding capacitors in series will cause the total capacitance to ?

A

Decrease

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16
Q

increasing the capacitance in a series circuit will cause the capacitive reactance to?

A

Decrease

17
Q

If the capacitance of a series capacitive circuit is decreased then the total current with ?

A

Decrease

18
Q

What is the phase relationship between current and voltage in a purely capacitive circuit ?

A

The current Leads the voltage

19
Q

Power factor of a capacitive circuit?

A

0.0

20
Q

What is the relationship between the reactive power and the apparent power in a capacitive circuit?

A

reactive power = apparent power

electrical second year (9 decks)

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