Question

The current flow in the light bulb is 0.5A

a.Calculate the amount of electric charge that flow through the bulb in 2 hour
b.If one election carries a
charge 1.6 x 10-14 c Find the number of election through the bulb in 2 hour?

Answer 1

Step-by-step explanation:

Given that,

The current in the light bulb, I = 0.5 A

(a) We know that,

Electric current = charge/time

or

Q = It

Put t = 2 hours = 7200 s

So,

Q = 0.5 × 7200

Q = 3600 C

(b) Charge on one electron,
`Q=1.6* 10^(-19)\ C`

Let there are n electrons flow through the bulb in 2 hours.

I = Q/t

Since, Q = ne

So,

I = ne/t

`n=(I* t)/(e)\\\\n=(0.5* 7200)/(1.6* 10^(-19))\\\\n=2.25* 10^(22)`

Hence, this is the required solution.