Rlc Circuits

Which of the transposed reactance formulae is incorrect?

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Select the correct phrase:

• In a capacitive circuit the voltage leads the current.

• In an inductive circuit the current lags the voltage.

• In a resistive circuit, the current and voltage are out of phase.

• In a capacitive circuit the current lags the voltage.

Select the correct sentence:

• Active power can only be developed in a pure inductance.

• Reactive power is developed in a capacitor.

• Apparent power increases as the power factor increases.

• Power factor is apparent power divided by active power.

Select the correct combination of quantity (equation) symbol and unit:

• W, Watt

• P, VAr

• X, Ohm

• Q, Watt

Tags

NGSS.HS-PS2-5

In a sinusoidal AC circuit containing an inductance and a resistance in series:

• the sum of the voltages across both components, as measured by a multimeter, adds up to the supply voltage.

• the voltage across both components are out of phase by 90 degrees.

• the current through each component is different.

• the inductance is proportional to the supply frequency.

Complete the sentence:

In a parallel circuit containing a capacitor and resistor connected to a sinusoidal supply:

• the voltage across each component is the same.

• the current in each component is the same.

• the current in the capacitor lags the applied voltage by 90 degrees.

• the total current drawn goes down as the frequency goes up.

When applying a fixed voltage AC at different frequencies through a capacitor with a capacitance of C as in the opposite figure, which of the following illustrates the relationship between current and frequency?

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Tags

NGSS.HS-PS3-5

• 0.226 A

• 0.451 A

• 0.555 A

• 0.750 A

Tags

NGSS.HS-PS3-5

NGSS.HS-PS3-2

The phase constant, ϕ, between the voltage and the current in an AC circuit depends on the _______.

• a) inductive reactance

• b) capacitive reactance

• c) resistance

• d) all of the above

Tags

NGSS.HS-PS2-5