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JEE PHYSICS MCQ: ELECTRIC FIELDS AND CHARGES

1 Medium

1 of 1

Application +4 | -1

An infinite number of point charges of same magnitude are kept along

X

-axis at

x=1 \mathrm{~cm}, x

=2 \mathrm{~cm}, x=4 \mathrm{~cm}, x=8 \mathrm{~cm}, \ldots

and so on. If the magnitude of charge is

5 \mathrm{~nC}

and consecutive charges are of opposite sign, the magnitude of electric field at

x=0

is

View answer and explanation

Correct option: D

36 \times 10^4 \mathrm{~N} / \mathrm{C}

Option D (

36 \times 10^4 \mathrm{~N} / \mathrm{C}

) is correct because it correctly sums the electric field contributions from each charge, considering alternating signs.

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Assertion:- Electric field lines do not cut at any point.
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are separated by a distance

r.

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\left( {{\varepsilon _r} = 8} \right)

, then the new force will be ……

N

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5 \times {10^{ - 2}}

coulomb. The force of on the electron is ________ N