Related Questions

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

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