1
COMEDK 2024 Morning Shift
+1
-0

The capacitance of a parallel plate capacitor is $$400 \mathrm{~pF}$$. It is connected to an ac source of $$100 \mathrm{~V}$$ having an angular frequency $$100 \mathrm{~rad~s}^{-1}$$. If the rms value of the current is $$4 \mu \mathrm{A}$$, the displacement current is:

A
$$4 \times 10^{-2} \mu \mathrm{A}$$
B
0.4 $$\mu$$A
C
4 $$\mu$$A
D
4 A
2
COMEDK 2023 Morning Shift
+1
-0

The instantaneous values of alternating current and voltages in a circuit given as

\begin{aligned} & i=\frac{1}{\sqrt{2}} \sin (100 \pi t) \mathrm{amp} \\ & e=\frac{1}{\sqrt{2}} \sin (100 \pi t+\pi / 3) \text { volt } \end{aligned}

The average power (in watts) consumed in the circuit is

A
$$\frac{1}{4}$$
B
$$\frac{\sqrt{3}}{4}$$
C
$$\frac{1}{2}$$
D
$$\frac{1}{8}$$
3
COMEDK 2023 Morning Shift
+1
-0

In the series L-C-R circuit shown, the impedance is

A
200$$\Omega$$
B
100$$\Omega$$
C
300$$\Omega$$
D
500$$\Omega$$
4
COMEDK 2023 Morning Shift
+1
-0

In the case of an inductor

A
voltage lags the current by $$\pi / 2$$
B
voltage leads the current by $$\pi / 2$$
C
voltage leads the current by $$\pi / 3$$
D
voltage leads the current by $$\pi / 4$$
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