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Q.
What is charge on $90\, kg$ of electrons?
Delhi UMET/DPMTDelhi UMET/DPMT 2008Electric Charges and Fields
Solution:
Since elm is the charge per $kg$ of electrons,
therefore, charge on $90\, kg$ of electrons
$= \frac{e}{m} \times 90$
$=1.76 \times 10^{11} \times 90$
$1.58 \times 10^{13} C$