1
KCET 2023
MCQ (Single Correct Answer)
+1
-0

In series $$L C R$$ circuit at resonance, the phase difference between voltage and current is

A
Zero
B
$$\pi$$
C
$$\frac{\pi}{4}$$
D
$$\frac{\pi}{2}$$
2
KCET 2023
MCQ (Single Correct Answer)
+1
-0

An ideal transformer has a turns ratio of 10. When the primary is connected to $$220 \mathrm{~V}, 50 \mathrm{~Hz}$$ as source, the power output is

A
10 times the power input
B
$$\frac{1}{10}$$th the power input
C
equal to power input
D
zero
3
KCET 2022
MCQ (Single Correct Answer)
+1
-0

In a series $$L C R$$ circuit, $$R=300 \Omega, L=0.9 \mathrm{H}, C=2.0 \mu \mathrm{F}$$ and $$\omega=1000 \mathrm{~rad} / \mathrm{s}$$, then impedance of the circuit is

A
$$900 \Omega$$
B
$$500 \Omega$$
C
$$400 \Omega$$
D
$$1300 \Omega$$
4
KCET 2022
MCQ (Single Correct Answer)
+1
-0

A series resonant $$\mathrm{AC}$$ circuit contains a capacitance $$10^{-6} \mathrm{~F}$$ and an inductor of $$10^{-4} \mathrm{H}$$. The frequency of electrical oscillations will be

A
$$10 \mathrm{~Hz}$$
B
$$\frac{10^5}{2 \pi} \mathrm{~Hz}$$
C
$$\frac{10}{2 \pi} \mathrm{~Hz}$$
D
$$10^5 \mathrm{~Hz}$$
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