Question

Calculate the number of coulombs per second if the area is 4cm, recombination rate of hole is 1000 cm/s and the differential length is 2mm. (a) 1.28x10-23 (b) 1.28x10-22 (c) 1.28x10-17 (d) 1.28x10-20

Answer 1

number of coulombs = 1.28 ×
`10^(-22)`

option b is correct

Step-by-step explanation:

Given data

area A = 4cm

rate of hole r = 1000 cm/s

length L = 2mm

to find out

number of coulombs

solution

we will apply here number of coulombs formula that is

number of coulombs = e×A×L× r

put here value e = 1.6 ×
`10^(-19)` coulombs

and A = 4 ×
`10^(-4)` mand length = 2 ×
`10^(-3)` m

number of coulombs = 1.6 ×
`10^(-19)` × 4 ×
`10^(-4)` × 2 ×
`10^(-3)` × 1000

number of coulombs = 1.28 ×
`10^(-22)`

so option b is correct