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Question

Physics Question on Electric charges and fields

What is charge on 90kg90\, kg of electrons?

A

1.58×1013 1.58 \times 10^{13}

B

2.3×1012 2.3 \times 10^{12}

C

2.53×1012 2.53 \times 10^{12}

D

None of these

Answer

1.58×1013 1.58 \times 10^{13}

Explanation

Solution

Since elm is the charge per kgkg of electrons,
therefore, charge on 90kg90\, kg of electrons
=em×90= \frac{e}{m} \times 90
=1.76×1011×90=1.76 \times 10^{11} \times 90
1.58×1013C1.58 \times 10^{13} C