Question

a 1.5V battery is connected to a light globe of resistance 2.0W. How many electrons leave the battery in 1 minute

Answer 1

Heya mate

Here is the answer:--

V= 1.5V
P= 2 W
We know,
P=VI
so, I= P/V

I= 2/1.5
I= 1.3 A
And time,t = 1min = 60 sec
So ,
I=ne/t (n= no. of electron and e=charge on 1 electron)

Putting all values in the formula

1.3= n*1.6*10^-16 / 60

n= 4.875*10^17 (n= number of electrons)

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Hope it helps✌✌


Thanks!!