21\(\mu C\)
3.6\(\mu C\)
4.0\(\mu C\)
4.4\(\mu C\)
Correct answer is A
F = \(\frac{Q^2}{4 \pi \varepsilon_o r^2}\)
I = 9 x 109 x \(\frac{Q^2}{0.2^2}\)
Q = \(\sqrt{\frac{0.04}{9 \times 10^9}}\)
= 2.11 x 10-6
which of the following materials is a conductor? ...
Which of the following statements is correct about light and sound waves? Both ...
A cell of internal resistance 2 π supplies current to a 6 π resistor. The efficiency of the ce...
Which of the following will affect the saturation vapour pressure of a liquid? ...