Qstnid -Ii-3-a Thin, Metallic Spherical Shell Contains A Charge Q On It. A Point Charge Q Is Placed At The Centre Of The Shell And Another Charge Q<sub>1</sub> Is Placed Outside It As Shown In The Figure (30-q1). All The Three Charges Are Positive. The Force On The Charge At The Centre Is - 30: Gauss's Law - Neet-xii-physics

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NEET-XII-Physics

30: Gauss's Law

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#3
A thin, metallic spherical shell contains a charge Q on it. A point charge q is placed at the centre of the shell and another charge q₁ is placed outside it as shown in the figure (30-Q1). All the three charges are positive. The force on the charge at the centre is
(a) toward left
(b) towards right
(c) upward
(d) zero
Figure
digAnsr: d
Ans : (d) zero
A charge placed outside a conductor can induce a charge on it or can affect the charge on its surface. But it does not affect what is contained inside the conductor. Similarly, charge q₁ can affect charge Q; still, the force inside the conductor remains zero. An analogy to the above statement is that when lightning strikes a car, the charge that appears on the car's metal surface does not affect its interior. Due to this passengers are recommended to sit inside the car.
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