MCQ
The current in resistance $R$ at resonance is
  • A
    zero
  • B
    minimum but finite
  • maximum but finite
  • D
    infinite

Answer

Correct option: C.
maximum but finite
c
c
At resonance $X_L = X_C$

$\Rightarrow R$ and current is maximum but finite, which is $I_{max} = \frac {E}{R}$, where $E$ is applied voltage.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

When the $rms$ voltages $V_L, V_C$ and $V_R$ are measured respectively across the inductor $L$, the capacitor $C$ and the resistor $R$ in a series $LCR$ circuit connected to an $AC$ source, it is found that the ratio $V_L : V_C : V_R = 1 : 2 : 3$. If the $rms$ voltage of the $AC$ sources is $100\, V$, the $V_R$ is close to........$V$
Match the following

Currents                                     $r.m.s.$ values

(1)${x_0}\sin \omega \,t$                               (i)$ x_0$

(2)${x_0}\sin \omega \,t\cos \omega \,t$                  (ii)$\frac{{{x_0}}}{{\sqrt 2 }}$

(3)${x_0}\sin \omega \,t + {x_0}\cos \omega \,t$        (iii) $\frac{{{x_0}}}{{(2\sqrt 2 )}}$

Which of the following statements concerning the depletion zone of an unbiased $PN $ junction is (are) true
Two unlike charges attract each other with a force of $10N.$ If the distance between them is doubled, the force between them is:
What is the angle of dip at the magnetic poles?
In the circuit shown if the $emf$ of source at an instant is $5\, V$, the potential difference across capacitor at the same instant is $4\, V$. The potential difference across $R$ at that instant may be .....$V$
Forty electric bulbs are connected in series across a $220\, V$ supply. After one bulb is fused, the remaining $39$ are connected again in series across the same supply. The illumination will be
The magnetic flux through a coil perpendicular to its plane and directed into paper is varying according to the relation $\phi = (2t^2 + 4t + 6)\, m\,Wb$. The $emf$ induced in the loop at $t = 4\, s$ is.......$V$
Three specimens $\text{A, B, C}$ of same radioactive element has activities $1$ microcurie, $1$ rutherford and $1$ becquerel respectively. Which specimen has maximum mass?
Eddy currents are used in