An electron is placed at the centre of a conducting sphere of radius $0.2$ metre having a uniform charge $5 \times 10^{- 2}$ coulomb. The force on the electron is :

z e r o

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11 \times 10^{9} N

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22.5 \times 10^{9} N

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2.5 \times 10^{9} N

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Solution

The correct option is B $z e r o$
We know electric field inside a conducting sphere $= 0$
$∴ E = 0$
we know force on an electron $F = e E$
$∴ F = 0$

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An electron is placed at the centre of a conducting sphere of radius 0.2 metre having a uniform charge 5×10−2 coulomb. The force on the electron is :

The correct option is B zeroWe know electric field inside a conducting sphere =0∴E=0we know force on an electron F=eE∴F=0

An electron is placed at the centre of a conducting sphere of radius $0.2$ metre having a uniform charge $5 \times 10^{- 2}$ coulomb. The force on the electron is :

The correct option is B $z e r o$
We know electric field inside a conducting sphere $= 0$
$∴ E = 0$
we know force on an electron $F = e E$
$∴ F = 0$