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6
MCQ (Single Correct Answer)

An inductor of reactance $1 \Omega$ and a resistor of $2 \Omega$ are connected in series to the terminals of a 6 V (rms) AC source. The power dissipated in the circuit is

A
8 W
B
12 W
C
14.4 W
D
18 W
7
MCQ (Single Correct Answer)

The output of a step-down transformer is measured to be 24 V when connected to a 12 W light bulb. The value of the peak current is

A
$1 / \sqrt{2} \mathrm{~A}$
B
$\sqrt{2} \mathrm{~A}$
C
2 A
D
$2 \sqrt{2} \mathrm{~A}$
8
MCQ (Multiple Correct Answer)

As the frequency of an AC circuit increases, the current first increases and then decreases. What combination of circuit elements is most likely to comprise the circuit?

A
Inductor and capacitor
B
Resistor and inductor
C
Resistor and capacitor
D
Resistor, inductor and capacitor
9
MCQ (Multiple Correct Answer)

In an alternating current circuit consisting of elements in series, the current increases on increasing the frequency of supply. Which of the following elements are likely to constitute the circuit?

A
Only resistor
B
Resistor and an inductor
C
Resistor and a capacitor
D
Only a capacitor
10
MCQ (Multiple Correct Answer)

Electrical energy is transmitted over large distances at high alternating voltages. Which of the following statements is (are) correct?

A
For a given power level, there is a lower current
B
Lower current implies less power loss
C
Transmission lines can be made thinner
D
It is easy to reduce the voltage at the receiving end using step-down transformers
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