1
MHT CET 2023 14th May Evening Shift
+1
-0

The power factor of an R-L circuit is $$\frac{1}{\sqrt{2}}$$. If the frequency of $$\mathrm{AC}$$ is doubled the power factor will now be

A
$$\frac{1}{\sqrt{3}}$$
B
$$\frac{1}{\sqrt{5}}$$
C
$$\frac{1}{\sqrt{7}}$$
D
$$\frac{1}{\sqrt{11}}$$
2
MHT CET 2023 14th May Evening Shift
+1
-0

An alternating voltage $$E=200 \sqrt{2} \sin (100 t)$$ volt is connected to a $$1 \mu \mathrm{f}$$ capacitor through an a.c. ammeter. The reading of the ammeter shall

A
10 mA
B
20 mA
C
40 mA
D
80 ma
3
MHT CET 2023 14th May Evening Shift
+1
-0

What will be the phase difference between virtual voltage and virtual current when current in the circuit is wattless?

A
$$60^{\circ}$$
B
$$45^{\circ}$$
C
$$90^{\circ}$$
D
$$180^{\circ}$$
4
MHT CET 2023 14th May Evening Shift
+1
-0

A coil having an inductance of $$\frac{1}{\pi} \mathrm{H}$$ is connected in series with a resistance of $$300 \Omega$$. If $$20 \mathrm{~V}$$ from a $$200 \mathrm{~Hz}$$ source are impressed across the combination, the value of the phase angle between the voltage and the current is

A
$$\tan ^{-1}\left(\frac{5}{4}\right)$$
B
$$\tan _{-1}\left(\frac{4}{5}\right)$$
C
$$\tan ^{-1}\left(\frac{3}{4}\right)$$
D
$$\tan ^{-1}\left(\frac{4}{3}\right)$$
EXAM MAP
Medical
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