1
KCET 2025
MCQ (Single Correct Answer)
+1
-0

In domestic electric mains supply, the voltage and the current are

A
AC voltage and DC current
B
DC voltage and DC current
C
DC voltage and AC current
D
AC voltage and AC current
2
KCET 2025
MCQ (Single Correct Answer)
+1
-0

A sinusoidal voltage produced by an AC generator at any instant t is given by an equation $\mathrm{V}=311 \sin 314$ t. The rms value of voltage and frequency are respectively

A
$200 \mathrm{~V}, 50 \mathrm{~Hz}$
B
$220 \mathrm{~V}, 100 \mathrm{~Hz}$
C
$220 \mathrm{~V}, 50 \mathrm{~Hz}$
D
$200 \mathrm{~V}, 100 \mathrm{~Hz}$
3
KCET 2025
MCQ (Single Correct Answer)
+1
-0

A series LCR circuit containing an AC source of 100 V has an inductor and a capacitor of reactances $24 \Omega$ and $16 \Omega$ respectively. If a resistance of $6 \Omega$ is connected in series, then the potential difference across the series combination of inductor and capacitor only is

A
80 V
B
400 V
C
8 V
D
40 V
4
KCET 2024
MCQ (Single Correct Answer)
+1
-0

Which of the following combinations should be selected for better tuning of an $L-C-R$ circuit used for communication?

A
$R=20 \Omega L=1.5 \mathrm{H}, C=35 \mu \mathrm{~F}$
B
$R=25 \Omega L=2.5 \mathrm{H}, \mathrm{C}=45 \mu \mathrm{~F}$
C
$R=25 \Omega, L=1.5 \mathrm{H}, C=45 \mu \mathrm{~F}$
D
$R=15 \Omega, L=3.5 \mathrm{H}, C=30 \mu \mathrm{~F}$
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