1
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

The formula of capacitative reactance is

A
$$2\pi fC$$
B
$$\frac{fC}{2\pi}$$
C
$$\frac{C}{2\pi f}$$
D
$$\frac{1}{2\pi fC}$$
2
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

For the same resonant frequency, if L is changed from L to $${L \over 3}$$, then capacitance should change from C to

A
$${C \over 3}$$
B
$$3C$$
C
$${2 \over 3}C$$
D
$$2C$$
3
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

What should be the value of self-inductance of an inductor that should be connected to 220 V 50 Hz supply, so that a maximum current of 0.9 A flows through it?

A
11 H
B
2 H
C
1.1 H
D
5 H
4
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

If impedance is $$\sqrt3$$ times of resistance, then find phase difference.

A
Zero
B
30$$^\circ$$
C
60$$^\circ$$
D
Data is incomplete
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