MCQ
In $L C R$ circuit, the capacitance is changed from $C$ to $4 C$. For the same resonant frequency, the inductance should be changed from $L$ to
- A$2 L$
- B$L / 2$
- ✓$L / 4$
- D$4 L$
✓
Answer
Correct option: C.
$L / 4$
$ \omega=\frac{1}{\sqrt{L_1 C_1}}=\frac{1}{\sqrt{L_2 C_2}} \Rightarrow L_2=\frac{L_1}{4}$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The coordinates of a moving particle at any time are given by $x=a t^2$ and $y=b t^2$. The speed of the particle at any moment is [DPMT 1984; CPMT 1997]
→When NPN transistor is used as an amplifier
The peak value of an Alternating current is $6$ amp, then r.m.s. value of current will be
→Two heating coils, one of fine wire and the other of thick wire of the same material and of the same length are connected in series and in parallel. Which of the following statement is correct
In which case the thermal conductivity increases from left to right
Two coherent sources separated by distance $d$ are radiating in phase having wavelength $\lambda$. A detector moves in a big circle around the two sources in the plane of the two sources. The angular position of $n=4$ interference maxima is given as
→A particle moves along a semicircle of radius $10 m$ in 5 seconds. The average velocity of the particle is
→The resultant of two rectangular simple harmonic motions of the same frequency and unequal amplitudes but differing in phase by $\frac{\pi}{2}$ is
→Two stars emit maximum radiation at wavelength $3600 \mathring {A}$ and $4800 \mathring A$ respectively. The ratio of their temperatures is
→One femtometer is equivalent to