1.

if 5 ampere of current is passed through a solution for 10 hours then the number of electons flown through the solution is (charge of electron =1.6*10-19)

Answer»

Given :-

Current = 5A

Time = 10 × 60 × 60 seconds

To Find :-

Number of electrons

Solution :-

We KNOW :-

Q = It

  • I denotes current
  • t denotes time
  • Q denotes charge

Substitute the values :-

:   \implies \sf Q = 5 \times 10 \times 60 \times 60

:  \implies \sf Q = 180000

Also we know :-

Q = ne

  • n denotes number of electrons
  • e denotes charge of one electron

:  \implies \sf  n =  \dfrac{Q }{e}

:  \implies \sf  n  =  \dfrac{180000}{1.6 \times  {10}^{ - 19} }

:  \implies \sf  n  = 112500 \times  {10}^{19}

Number of electrons :- 1125 × 10^21



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