1
COMEDK 2024 Morning Shift
+1
-0

A coil of inductance $$1 \mathrm{H}$$ and resistance $$100 \Omega$$ is connected to an alternating current source of frequency $$\frac{50}{\pi} \mathrm{~Hz}$$. What will be the phase difference between the current and voltage?

A
90$$^\circ$$
B
30$$^\circ$$
C
60$$^\circ$$
D
45$$^\circ$$
2
COMEDK 2024 Morning Shift
+1
-0

A coil offers a resistance of $$20 \mathrm{~ohm}$$ for a direct current. If we send an alternating current through the same coil, the resistance offered by the coil to the alternating current will be :

A
$$0 \Omega$$
B
Greater than $$20 \Omega$$
C
Less than $$20 \Omega$$
D
$$20 \Omega$$
3
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
4
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
$$\frac{1}{8}$$
EXAM MAP
Medical
NEET