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AIIMS 2004
Exam
AIIMS
Year
2004
Subject
Physics
Chapter
Electrostatics

AIIMS 2004 · Physics · Electrostatics

In the basic CsCl crystal structure, Cs^ + and Cl^ - ions are...

In the basic CsCl\mathrm{CsCl} crystal structure, Cs+\mathrm{Cs}^{+} and Cl−\mathrm{Cl}^{-}ions are arranged in a bcc configuration as shown in the figure. The net electrostatic force exerted by the eight Cs+\mathrm{Cs}^{+}ions on the Cl−\mathrm{Cl}^{-}ions is In the basic CsCl crystal structure, Cs^ + and Cl^ - ions are arranged in a bcc configuration as shown in the figure.

Options

  1. A14πε04e23a2\frac{1}{4 \pi \varepsilon_0} \frac{4 e^2}{3 a^2}
  2. B14πε016e23a2\frac{1}{4 \pi \varepsilon_0} \frac{16 e^2}{3 a^2}
  3. C14πε032e23a2\frac{1}{4 \pi \varepsilon_0} \frac{32 e^2}{3 a^2}
  4. Dzero.

Correct answer

D. zero.

Step-by-step solution

The electrostatic force due to one Cs+\mathrm{Cs}^{+}ion is balanced by diagonally opposite other Cs+\mathrm{Cs}^{+}. Thus the net electrostatic force on Cl−\mathrm{Cl}^{-}ion due to eight Cs+\mathrm{Cs}^{+} ions is zero.
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