MHT CET 2024 9th May Morning Shift | Alternating Current Question 31 | Physics

LC series resonant circuit produces resonant frequency ' $f$ '. If ' $L$ ' is tripled and ' $C$ ' is increased by $3 C$, the resonant frequency will be

$\frac{\mathrm{f}}{3}$

$\frac{\mathrm{f}}{2 \sqrt{3}}$

$\mathrm{6 f}$

$\frac{\mathrm{f}}{2 \sqrt{2}}$

MHT CET 2024 9th May Morning Shift

MCQ (Single Correct Answer)

-0

When a capacitor is connected in series LR circuit, the alternating current flowing in the circuit

is zero.

increases.

decreases.

remain constant.

MHT CET 2024 4th May Evening Shift

MCQ (Single Correct Answer)

-0

An alternating current is given by $\mathrm{I}=100 \sin (50 \pi \mathrm{t})$. How many times will the current become zero in one second?

50 times

25 times

40 times

100 times

MHT CET 2024 4th May Evening Shift

MCQ (Single Correct Answer)

-0

A coil of self inductance L is connected in series with a bulb B and an a.c. source. Brightness of the bulb decreases when

frequency of a.c. source is decreased.

number of turns in the coil is reduced.

a capacitance of reactance $\left(\mathrm{X}_{\mathrm{L}}-\mathrm{X}_{\mathrm{C}}\right)$ is included in the same circuit.

an iron rod is inserted in the coil.

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