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

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

COMEDK 2023 Morning Shift Physics - Alternating Current Question 13 English

A
200$$\Omega$$
B
100$$\Omega$$
C
300$$\Omega$$
D
500$$\Omega$$
2
COMEDK 2023 Morning Shift
MCQ (Single Correct Answer)
+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 $$\pi / 4$$
3
COMEDK 2023 Morning Shift
MCQ (Single Correct Answer)
+1
-0

In an electrical circuit $$R, L, C$$ and $$\mathrm{AC}$$ voltage source are all connected in series. When $$L$$ is removed from the circuit, the phase difference between the voltage and the current in the circuit is $$\pi / 3$$. If instead $$C$$ is removed from the circuit, the phase difference is again $$\pi / 3$$. The power factor of the circuit is

A
$$1 / 2$$
B
$$1 \sqrt{2}$$
C
1
D
$$\frac{\sqrt{3}}{2}$$
4
COMEDK 2023 Evening Shift
MCQ (Single Correct Answer)
+1
-0

$$220 \mathrm{~V}$$ ac is more dangerous than $$220 \mathrm{~V}$$ dc Why?

A
The peak value of ac is greater than the given value of dc
B
Shock received from ac is always repulsive
C
The frequency of ac is more than that of dc
D
The speed of ac is more than that of $$\mathrm{dc}$$
COMEDK Subjects