1
MHT CET 2024 2nd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

In an a.c. circuit $\mathrm{I}=100 \sin 200 \pi \mathrm{t}$. The time required for the current to achieve its peak value will be

A
$\frac{1}{100} \mathrm{~s}$
B
$\frac{1}{200} \mathrm{~s}$
C
$\frac{1}{300} \mathrm{~s}$
D
$\frac{1}{400} \mathrm{~s}$
2
MHT CET 2024 2nd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

In an A.C. circuit, the potential difference ' $V$ ' and current 'I' are given respectively by $\mathrm{V}=100 \sin (100 \mathrm{t}) \mathrm{V}, \mathrm{I}=100 \sin \left(100 \mathrm{t}+\frac{\pi}{3}\right) \mathrm{mA}$ The power dissipated in the circuit will be [Given $\rightarrow \cos \frac{\pi}{3}=\frac{1}{2}$]

A
$10^4 \mathrm{~W}$
B
10 W
C
2.5 W
D
5 W
3
MHT CET 2024 2nd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

In the given circuit, when $S_1$ is closed, the capacitor gets fully charged. Now $\mathrm{S}_1$ is open and $\mathrm{S}_2$ is closed. Then

MHT CET 2024 2nd May Morning Shift Physics - Alternating Current Question 52 English

A
there is no exchange of energy between L and C .
B
the current in the circuit is in the same direction.
C
the instantaneous current in the circuit may be $\mathrm{V}\left(\sqrt{\frac{\mathrm{C}}{\mathrm{L}}}\right)$.
D
the energy stored in the circuit is purely in the form of magnetic energy.
4
MHT CET 2023 14th May Evening Shift
MCQ (Single Correct Answer)
+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
$$\frac{1}{\sqrt{11}}$$
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