MCQ
An empty thick conducting shell of inner radius $a$ and outer radius $b$ is shown in figure.If it is observed that the inner face of the shell carries a uniform charge density $-\sigma$ and the surface carries a uniform charge density $ '\sigma '$

If the charge $q_A$ is slowly moved inside the shell, then choose the statement$(s)$

  • A
    Charge distribution on the inner and outer face of the shell changes
  • B
    The force acting on the charge $B$ charges
  • C
    The charge $B$ also starts moving slowly
  • None of these

Answer

Correct option: D.
None of these
d

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

The photoelectric effect can be understood on the basis of
Find out correct option which describe the Red shift of distant galaxies.
In the circuit (Fig), the final current through $30\, \Omega $ resistance when circuit is completed is.........$A$
The magnetic field at the centre of current carrying coil is
Light wave propogates rectilinearly, due to
Nucleus a having $Z=17$ and equal number of protons and neutrons has $1.2\,MeV$ binding energy per nucleon.Another nucleus $B$ of $Z=12$ has total $26$ nucleons and $1.8\,MeV$ binding energy per nucleons.The difference of binding energy of $B$ and $A$ will be $...........MeV$.
A capacitor stores $60\ \mu C$ charge when connected across a battery. When the gap between the plates is filled with a dielectric , a charge of $120\ \mu C$ flows through the battery. The dielectric constant of the material inserted is :
A conducting square frame of side $'a'$ and a long straight wire carrying current $I$ are located in the same plane as shown in the figure. The frame moves to the right with a constant velocity $'V'.$ The $emf$ induced in the frame will be proportional to
Which of the following are not electromagnetic waves
An $NPN$ transistor is used in common emitter configuration as an amplifier with $1\,k\Omega $ load resistance. Signal voltage of $10\,mV$ is applied across the base emitter. This produces a $3\,mA$ change in the collector current and $15\,\mu A$ change in the base current of the amplifier. The input resistance and voltage gain are