COMEDK 2025 Morning Shift | Alternating Current Question 4 | Physics

An LCR series ac circuit is at resonance with 10 V each across $\mathrm{L}, \mathrm{C}$ and R . If the resistance is halved, the respective voltage across $R, C$ and $L$ are

$5 \mathrm{~V}, 10 \mathrm{~V}, 10 \mathrm{~V}$

$10 \mathrm{~V}, 5 \mathrm{~V}, 5 \mathrm{~V}$

$5 \mathrm{~V}, 5 \mathrm{~V}, 5 \mathrm{~V}$

$10 \mathrm{~V}, 20 \mathrm{~V}, 20 \mathrm{~V}$

COMEDK 2024 Evening Shift

MCQ (Single Correct Answer)

-0

When an A.C. source is connected to a inductive circuit,

voltage and current are in same phase.

voltage is ahead of current in phase.

the phase between voltage and current depends upon the value of inductance

voltage lags behind current in phase.

COMEDK 2024 Evening Shift

MCQ (Single Correct Answer)

-0

In the $$\mathrm{A} . \mathrm{C}$$. circuit given below, voltmeters $$\mathrm{V}_1$$ and $$\mathrm{V}_2$$ read $$100 \mathrm{~V}$$ each. Find the reading of the voltmeter $$\mathrm{V}_3$$ and the ammeter $$\mathrm{A}$$.

COMEDK 2024 Evening Shift Physics - Alternating Current Question 5 English

220 V, 2 A

110 V, 2 A

110 V, 4 A

220 V, 1 A

COMEDK 2024 Afternoon Shift

MCQ (Single Correct Answer)

-0

A transformer has 400 turns in its primary winding and 800 turns in its secondary winding. The primary voltage is $$20 \mathrm{~V}$$ and the load in the secondary is 4 ohm. The current in the primary, assuming it to be an ideal transformer, is

40 A

20 A

4 A

2 A

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