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JEE Main 202330 JanuaryEvening Shift
Exam
JEE Main
Year
2023
Date
30 January
Shift
Evening Shift
Subject
Physics
Chapter
Electrostatics

JEE Main 2023 · 30 January · Evening Shift · Physics · Electrostatics

As shown in the figure, a point charge Q is placed at the centre of...

As shown in the figure, a point charge QQ is placed at the centre of conducting spherical shell of inner radius aa and outer radius bb. The electric field due to charge QQ in three different regions I,IIandIIII, II\text{and}III is given by : (I:rb)( I: r b )

As shown in the figure, a point charge Q is placed at the centre of conducting spherical shell of inner radius a and

Options

  1. AEI=0,EII=0,EIII≠0{E}_{I} = 0, {E}_{II} = 0, {E}_{III} \ne 0
  2. BEI≠0,EII=0,EIII≠0{E}_{I} \ne 0, {E}_{II} = 0, {E}_{III} \ne 0
  3. CEI≠0,EII=0,EIII=0{E}_{I} \ne 0, {E}_{II} = 0, {E}_{III} = 0
  4. DEI=0,EII=0,EIII=0{E}_{I} = 0, {E}_{II} = 0, {E}_{III} = 0

Correct answer

B. EI≠0,EII=0,EIII≠0{E}_{I} \ne 0, {E}_{II} = 0, {E}_{III} \ne 0

Step-by-step solution

As shown in the figure, a point charge Q is placed at the centre of conducting spherical shell of inner radius a and

In region I, due to charge at centre, electric field will be present.

But in region II, electric field will be zero as electric field inside material of conductor is zero.

Again for outside region, net charges enclosed is not zero and therefore electric field will exist.

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