An electron and a proton are sent into an electric field. The ratio of magnitudes of force experienced by them is :

1 : 1

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1 : 1840

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1840 : 1

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1 : 9.11

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Solution

The correct option is B $1 : 1$
We know force experienced by a charge q in electric field $= E q$
$∴$ force experienced by proton $= E \times (e)$
force experienced by electron $= E \times (- e)$
$| F_{p} | : | F_{e} | = | E (e) | : | E (- e) |$
$= 1 : 1$

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