JEE Main 2018 — Electrostatics Question with Solution
From: JEE Main 2018 (Online) 15th April Evening Slot
Question
A solid ball of radius R has a charge density
given by = o (1 ) for 0 r R. The electric field outside the ball is :
given by = o (1 ) for 0 r R. The electric field outside the ball is :
Choose an option
Show full solutionCorrect option: B
Correct answer
B
Step-by-step explanation
Electric field outside the ball is given by
E = .............(i)
Now, dq = dV = (4r2)dr
q =
=
=
q = ......(ii)
From eqns. (i) and (ii), E =
E = .............(i)
Now, dq = dV = (4r2)dr
q =
=
=
q = ......(ii)
From eqns. (i) and (ii), E =
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