1
COMEDK 2026 Morning Shift
MCQ (Single Correct Answer)
+1
-0

An AC generator having 400 turns and an area of cross section of $2 \times 10^{-3} \mathrm{~m}^2$ rotates with an angular speed of $200 \pi \mathrm{rad} \mathrm{s}^{-1}$ in a uniform magnetic field of strength 0.4 T . The generator is connected to the primary of an ideal transformer having 500 turns in the primary and 2000 turns in the secondary. The secondary is connected to a $400 \Omega$ resistive load. What is the rms current in the secondary of the transformer? Assume, the transformer is ideal and the resistance of the coil is negligible

A

2.84 A

B

14.2 A

C

1.41 A

D

28.4 A

2
COMEDK 2026 Morning Shift
MCQ (Single Correct Answer)
+1
-0

A solenoid having resistance $R=60 \Omega$ and inductance $L=0.4 \mathrm{H}$ is connected to an AC source $V=100 \sqrt{2} \sin 200 t$.

Find the maximum current.

A

1.732 A

B

2.828 A

C

1.414 A

D

0.707 A

3
COMEDK 2026 Morning Shift
MCQ (Single Correct Answer)
+1
-0

If wattless current flows in an AC circuit, then the circuit is:

A. LR circuit

B. Purely capacitive circuit

C. Purely resistive circuit

D. LCR circuit

A

B

B

C

C

D

D

A

4
COMEDK 2025 Evening Shift
MCQ (Single Correct Answer)
+1
-0
A power transmission line feeds input power at 2200 V to a step-down transformer with its primary windings having 2000 turns. The output power is delivered at 220 V by the transformer. If the current in the primary of the transformer is 2 A and its efficiency is $80 \%$, the output current would be:
A
32 A
B
8 A
C
16 A
D
4 A

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