1
COMEDK 2024 Morning Shift
+1
-0

A transformer which steps down $$330 \mathrm{~V}$$ to $$33 \mathrm{~V}$$ is to operate a device having impedance $$110 \Omega$$. The current drawn by the primary coil of the transformer is :

A
0.3 A
B
0.03 A
C
3 A
D
1.5 A
2
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$$^\circ$$
3
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
$$20 \Omega$$
4
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
EXAM MAP
Medical
NEET