Question

1. How many electrons should be added to a body so that it may have a
charge of (a) - 2 coulomb (b) - 5 milli coulomb (c) - 0-4 uC. O
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Answer 1

Answer:a- 1.25×20^19

Similarly use the formula q=ne for b and c where q= charge, n= no of electrons e= charge present on an electron

Explanation:

Answer 2

Answer:

a)12.5×10^18

Explanation:

a) As we know that ,

Q=NE ,where Q=Electric current ,N= no of charge ,E=charge on one electron or proton

Now,

Q= -2 coulomb (given)

E=1.6 ×10 ^ -19

Q=NE

N=Q/E

=-2/1.6×10^-19

= -2×6.25×10^18

= -12.5×10^18.

since,we need magnitude so we will neglect minus sign

therefore,N=12.5×10^18