CBSE Class 7 Answered

Hi Biresh,

A battery always gives the same output voltage.

So, if you connect an ammeter with the help of wires to the battery and note the current, then you will be able to find the number of charges flowing.

q = It

If the battery conducts say 1 mA current then the charge flowing through it is 1 mC.

Now, 1 electron has 1.6 × 10^-19 C of charge

Therefore, 1 mC will be equal to 1/1.6 × 10^-19 = 6.25 × 10¹⁵

Hence, the number of charges flowing through the battery is 6.25 × 10¹⁵