MHT CET 2025 23rd April Morning Shift | Alternating Current Question 3 | Physics

An a. c. source is connected across a pure inductor. Which one of the following figures shows the correct phase relation between the current and e.m.f.?

MHT CET 2025 23rd April Morning Shift

MCQ (Single Correct Answer)

-0

In an a.c. circuit with pure capacitance ' C ' and a.c. source $E=E_0 \sin \omega t$, the equation of instantaneous current is given by

$\mathrm{I}=\mathrm{E}_0 \omega \mathrm{c} \sin (\omega \mathrm{t})$

$I=E_0 \omega c \sin \left(\omega t+\frac{\pi}{2}\right)$

$\mathrm{I}=\frac{\mathrm{E}_0}{\omega \mathrm{c}} \sin (\omega \mathrm{t})$

$\mathrm{I}=\frac{\mathrm{E}_0}{\omega \mathrm{c}} \sin \left(\omega \mathrm{t}+\frac{\pi}{2}\right)$

MHT CET 2025 23rd April Morning Shift

MCQ (Single Correct Answer)

-0

A current of 5 A is flowing at 220 V in a primary coil of a transformer. If the voltage produced in the secondary coil is 2200 V and $50 \%$ of power is lost, then the current in the secondary coil will be

2.5 A

5 A

0.25 A

$\quad 0.025 \mathrm{~A}$

MHT CET 2025 23rd April Morning Shift

MCQ (Single Correct Answer)

-0

Figure shows the combination of inductances and capacitances. Resonant frequency of the $\mathrm{L}-\mathrm{C}$ circuit is

MHT CET 2025 23rd April Morning Shift Physics - Alternating Current Question 4 English

$\frac{1}{2 \pi \sqrt{\mathrm{LC}}}$

$\frac{1}{3 \pi \sqrt{\mathrm{LC}}}$

$\frac{1}{4 \pi \sqrt{\mathrm{LC}}}$

$\frac{1}{6 \pi \sqrt{\mathrm{LC}}}$.

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