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 × 10-31 kg and .1.6 × 10-19 C ).

Question

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 × 10-31 kg and .1.6 × 10-19 C ). (A) - 5.6 ×10-11 N/C (B) - 4. 8 ×10-15 N/C (C) - 1. 6 ×10-19 N/C (D) - 3. 2 ×10-19 N/C

Tardigrade Admin · Accepted Answer

- eE = mg vecE = - (9.1 ×10-13×10/1.6 ×10-19 ) = - 5.6 ×10-11 N/C

Q. 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 $9.1 \times 1 0^{- 31} k g$ and $1.6 \times 1 0^{- 19} C)$ .

$- 5.6 \times 1 0^{- 11} N / C$

$- 4.8 \times 1 0^{- 15} N / C$

$- 1.6 \times 1 0^{- 19} N / C$

$- 3.2 \times 1 0^{- 19} N / C$

$- e E = m g$
$E = - \frac{9.1 \times 1 0 ^{- 13} \times 10}{1.6 \times 1 0 ^{- 19}}$
$= - 5.6 \times 1 0^{- 11} N / C$

Q. 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 9.1×10−31kg and 1.6×10−19C).

−5.6×10−11N/C

−4.8×10−15N/C

−1.6×10−19N/C

−3.2×10−19N/C