MCQ
The current in series $LCR$ circuit will be maximum when $\omega$ is
- AAs large as possible
- BEqual o natural frequency of $LCR$ system
- C$\sqrt {LC} $
- ✓$\sqrt {1/LC} $
✓
Answer
Correct option: D.
$\sqrt {1/LC} $
d
(d) At resonant frequency current in series $LCR$ circuit is maximum.
(d) At resonant frequency current in series $LCR$ circuit is maximum.
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
Electrons moving with different speeds enter a uniform magnetic field in a direction perpendicular to the field., time periods of rotation will be :
A reflecting telescope has a large mirror as its objective with radius of curvature equal to $80\,cm$. The magnifying power of this telescope if eye piece used has a focal length of $1.6\, cm$ is
→A plane mirror is placed along the $x-$ axis facing negative $y-$ axis. The mirror is fixed. A point object is moving with velocity $3\hat i + 4\hat j$ in front of plane mirror. The relative velocity of image with respect of its object
→A point charge $Q$ is moving in a circular orbit of radius $R$ in the $x$-y plane with an angular velocity $\omega$. This can be considered as equivalent to a loop carrying a steady current $\frac{Q_\omega}{2 \pi}$. A uniform magnetic field along the positive z-axis is now switched on, which increases at a constant rate from 0 to $B$ in one second. Assume that the radius of the orbit remains constant. The application of the magnetic field induces an emf in the orbit. The induced emf is defined as the work done by an induced electric field in moving a unit positive charge around a closed loop. It is known that, for an orbiting charge, the magnetic dipole moment is proportional to the angular momentum with a proportionally constant $\gamma$.
→$1.$ The magnitude of the induced electric field in the orbit at any instant of time during the time interval of the magnetic field change is :
$(A)$ $\frac{B R}{4}$ $(B)$ $\frac{B R}{2}$ $(C)$ $BR$ $(D)$ $2BR$
$2.$ The change in the magnetic dipole moment associated with the orbit, at the end of the time interval of the magnetic field change, is:
$(A)$ $-\gamma B Q R^2$ $(B)$ $-\gamma \frac{B Q R^2}{2}$ $(C)$ $\gamma \frac{ BQR ^2}{2}$ $(D)$ $\gamma B Q R^2$
Give the answer question $1$ and $2.$
Potential at a point x-distance from the centre inside the conducting sphere of radius R and charged with charge Q is
The function of rectifier is :
A loop of flexible wire of irregular shape carrying current is placed in an external magnetic field. Identify the effect of the field on the wire.
A magnet is dropped down an infinitely long vertical copper tube. Then
A square surface of side $L$ meter in the plane of the paper is placed in a uniform electric field $E(volt/m)$ acting along the same plane at an angle $\theta$ with the horizontal side of the square as shown in figure.The electric flux linked to the surface, in units of $volt \;m $
→Magnets cannot be made from which of the following substances