Electromagnetism
Current Electricity
MCQ (Single Correct Answer)
Moving Charges and Magnetism
MCQ (Single Correct Answer)
Magnetism and Matter
MCQ (Single Correct Answer)
Electromagnetic Induction
MCQ (Single Correct Answer)
Alternating Current
MCQ (Single Correct Answer)
Electromagnetic Waves
MCQ (Single Correct Answer)
Modern Physics
Dual Nature of Radiation
MCQ (Single Correct Answer)
Semiconductor Devices and Logic Gates
MCQ (Single Correct Answer)
Communication Systems
MCQ (Single Correct Answer)
1
COMEDK 2023 Evening Shift
MCQ (Single Correct Answer)
+1
-0

What should be the inductance of an inductor connected to $$200 \mathrm{~V}, 50 \mathrm{~Hz}$$ source so that the maximum current of $$\sqrt{2}$$ A flows through it?

A
$$\frac{\sqrt{2}}{\pi} H$$
B
$$2 \pi H$$
C
$$\frac{2}{\pi} \mathrm{H}$$
D
$$\frac{\pi}{2} H$$
2
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

During the phenomenon of resonance

A
the amplitude of oscillation becomes large
B
the frequency of oscillation becomes large
C
the time period of oscillation becomes large
D
All of the above
3
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

A DC ammeter and a hot wire ammeter are connected to a circuit in series. When a direct current is passed through circuit, the DC ammeter shows 6 A. When AC current flows through circuit, what is the average readings in DC ammeter and the AC ammeter, if DC and AC currents flows simultaneously through the circuit?

A
DC = 6 A, AC = 10 A
B
DC = 3 A, AC = 5 A
C
DC = 5 A, AC = 8 A
D
DC = 2 A, AC = 3 A
4
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

A series L-C-R circuit is connected to an AC source of 220 V and 50 Hz shown in figure. If the readings of the three voltmeters $$V_1,V_2$$ and $$V_3$$ are 65 V, 415 V and 204 V respectively, the value of inductance and capacitance will be

COMEDK 2022 Physics - Alternating Current Question 16 English

A
2.0 H, 5 $$\mu$$F
B
1.0 H, 5 $$\mu$$F
C
4.0 H, 6 $$\mu$$F
D
1.0 H, 2 $$\mu$$F
COMEDK Subjects