A body has $-\, 80$ $micro\, coulomb$ of charge. Number of additional electrons in it will be
$8 \times {10^{ - 5}}$
$80 \times {10^{ - 17}}$
$5 \times {10^{14}}$
$1.28 \times {10^{ - 17}}$
Who represented the quantization of electric charge first and on what basis ?
Write the activity to make simple electroscope.
What is static electrical induction ?
What is called earthing ? Give importance of earthing in wiring.