Question

What is total charge on 90kg electron?

Answer 1

Q = Mq/m (total mass M divided by electron mass m is number of electrons. Multiply by charge per electron)

bye this formula u can calculate

Answer 2

Answer:

The charge on 90kg of electrons is -15.89 \times 10{}^{12} C

Explanation:

We are required to find the total charge on 90kg of electrons.For that we need to find no.of electrons which weigh 90kg together.

This can be found using relation

$n = \frac{given \: mass}{mass \: of \: electron}$

We know that mass of electron is

$m _{e} = 9.109 \times 10 {}^{ - 31} kg$

Therefore,

$n = \frac{90}{9.109 \times 10 {}^{ - 31} } = 9.88 \times 10 {}^{31}e {}^{ - }$

No.of electrons are known.Charge on each electron is

$q = -1.609 \times 10 {}^{ - 19} C$

Therefore,Our required charge is

Q=nq={9.88 \times 10{}^{31}} \times{ (-1.609 \times 10{}^{-19})C}

={-15.89} \times {10{}^{12} C}

Therefore,The charge on 90kg of electrons is -15.89 \times 10{}^{12} C

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