calculate the quantity of electricity passed when 0.4A flows for 1hr 20minutes through an electrolytic cell.

(a) 4800C (b) 3840C (c) 1920C (d) 32C?

an ampere (A) is a coulomb (C) per second

80 min * (60 s/min) * 0.4 A = ? C

32c

Option (d)

3200A

To calculate the quantity of electricity passed (Q), you can use the formula:

Q = I x t

Where:
Q = Quantity of electricity passed (in coulombs)
I = Current (in amperes)
t = Time (in seconds)

First, let's convert the time from 1 hour 20 minutes to seconds. There are 60 seconds in a minute and 60 minutes in an hour. Therefore, 1 hour 20 minutes is equal to (1 x 60 x 60) + (20 x 60) = 4800 seconds.

Now, we can substitute the given values into the formula:

Q = 0.4 A x 4800 s
Q = 1920 C

Therefore, the quantity of electricity passed when 0.4 A flows for 1 hour 20 minutes through the electrolytic cell is 1920 coulombs.

So, the correct answer is option (c) 1920C.