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Q.

An $α$ particle is situated in an electric field of strength $15 \times 10^{4} N C^{- 1}$ . Force acting on it is

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a

None of these

b

$48 \times 10^{- 14} N$

c

$4.8 \times 10^{- 12} N$

d

$4.8 \times 10^{- 14} N$

answer is B.

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Detailed Solution

$F = E q = E 2 e = 15 \times 10^{4} \times 2 \times 1.6 \times 10^{- 19} = 4.8 \times 10^{- 14} N$

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An α particle is situated in an electric field of strength15×104NC−1 . Force acting on it is