MCQ
In $L-C-R$ circuit if resistance increases, quality factor
- Aincreases finitely
- ✓decreases finitely
- Cremains constant
- DNone of the above
✓
Answer
Correct option: B.
decreases finitely
b
b
The $Q-$ factor of series resonant circuit is given by $Q\, = \,\frac{{\omega _r^2L}}{R}$ It is evident from the relation that as $R$ is increased, $Q-$ factor of the circuit is decreased.
b
The $Q-$ factor of series resonant circuit is given by $Q\, = \,\frac{{\omega _r^2L}}{R}$ It is evident from the relation that as $R$ is increased, $Q-$ factor of the circuit is decreased.
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 distance $v$ of the real image formed by a convex lens is measured for various object distance $u$. A graph is plotted between $v$ and $u$, which one of the following graphs is correct
→In a compound microscope the objective of ${f_o}$ and eyepiece of ${f_e}$ are placed at distance $L$ such that $L$ equals
→The electric field in a region surrounding the origin is uniform and along the $x$ - axis. A small circle is drawn with the centre at the origin cutting the axes at points $A, B, C, D$ having co-ordinates $(a, 0), (0, a), (-a, 0), (0, -a)$; respectively as shown in figure then potential in minimum at the point
→As shown in the figure, a combination of a thin plano concave lens and a thin plano convex lens is used to image an object placed at infinity. The radius of curvature of both the lenses is $30\,cm$ and refraction index of the material for both the lenses is $1.75$. Both the lenses are placed at distance of $40\,cm$ from each other. Due to the combination, the image of the object is formed at distance $x =..........cm$, from concave lens.
→wavelength for electron in an orbit of hydrogen atom is $10^{-9} m$. The principle quantum number for this electron is
→A convex lens of focal length $f$ is placed somewhere in between an object and a screen. The distance between the object and the screen is $x$. If the numerical value of the magnification produced by the lens is $m,$, then the focal length of the lens is
→A hemispherical glass body of radius $10\, cm$ and refractive index $1.5$ is silvered on its curved surface. A small air bubble is $6\, cm$ below the flat surface inside it along the axis. The position of the image of the air bubble made by the mirror is seen
→A $10\, m$ long wire of $20\,\Omega$ resistance is connected with a battery of $3\, volt$ $e.m.f.$ (negligible internal resistance) and a $10 \,\Omega$ resistance is joined to it is series. Potential gradient along wire in volt per meter is
→A charged particle oscillates about its mean equilibrium position with a frequency of $10^9\ Hz$. The electromagnetic waves produced:
→The kinetic energy of electron in the first Bohr orbit of the hydrogen atom is......$eV$
→