JEE PHYSICS MCQ: ELECTRIC FIELDS AND CHARGES

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The electric field intensity just sufficient to balance the earth's gravitational attraction on an electron will be: (given mass and charge of an electron respectively are

9.1 \times 10^{-31} \mathrm{~kg}

and

1.6 \times 10^{-19} \mathrm{C}

View answer and explanation

Correct option: A

-5.6 \times 10^{-11} \mathrm{~N} / \mathrm{C}

Option A (

-5.6 \times 10^{-11} \mathrm{~N} / \mathrm{C}

) is correct because the electric field required to balance the gravitational force on an electron is given by

E = -mg/e

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