1
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
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
A
$5 \mathrm{~V}, 10 \mathrm{~V}, 10 \mathrm{~V}$
B
$10 \mathrm{~V}, 5 \mathrm{~V}, 5 \mathrm{~V}$
C
$5 \mathrm{~V}, 5 \mathrm{~V}, 5 \mathrm{~V}$
D
$10 \mathrm{~V}, 20 \mathrm{~V}, 20 \mathrm{~V}$
2
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

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

A
voltage and current are in same phase.
B
voltage is ahead of current in phase.
C
the phase between voltage and current depends upon the value of inductance
D
voltage lags behind current in phase.
3
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-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 12 English

A
220 V, 2 A
B
110 V, 2 A
C
110 V, 4 A
D
220 V, 1 A
4
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-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

A
40 A
B
20 A
C
4 A
D
2 A
COMEDK Subjects
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