The impedance of a series RC circuit varies directly with frequency.

If A varies directly proportional to C and B also varies directly proportional to C, which one of the following is not correct ?

A

$$\left( {A + B} \right)\alpha \,C$$

B

$$\left( {A - B} \right)\alpha \,\frac{1}{C}$$

C

$$\sqrt {AB} \,\alpha \,C$$

D

$$\frac{A}{B} = {\text{constant}}$$

The impedance of an RL circuit varies inversely with frequency.

A

True

B

False

In an ac circuit, power to the load peaks at the frequency at which the load impedance is the complex conjugate of the output impedance.

A

True

B

False

If the frequency is halved and the resistance is doubled, the impedance of a series RL circuit

A

Doubles

B

Halves

C

Remains constant

D

Cannot be determined without values

When the frequency of the voltage applied to a series RL circuit is decreased, the impedance decreases

A

True

B

False

When the frequency of the voltage applied to a series RL circuit is decreased, the impedance

A

Decreases

B

Increases

C

Does not change

D

Cannot be determined without values

In a series RC circuit, when the frequency and the resistance are halved, the impedance

A

Doubles

B

Is halved

C

Is reduced to one-fourth

D

Cannot be determined without values

When the frequency of the voltage applied to a series RC circuit is decreased, the impedance

A

Increases

B

Decreases

C

Remains the same

D

Doubles

In a series resonant circuit, the impedance of the circuit is

A

Minimum

B

Maximum

C

Zero

D

None of the above

When the frequency is decreased, the impedance of a parallel RL circuit

A

Increases

B

Decreases

C

Remains constant

D

Is not a factor

The impedance of a series RC circuit varies directly with frequency.

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