Question

A charge of 90 C passes through a wire in 1 hour 15 minutes . what is the current in the wire

Answer 1

Current = C / seconds.

1 hour = 3600 seconds
15 minutes = 900 seconds

1 hour 15 minutes = 4500 seconds

90 C / 4500 sec = 0.02 amperes = 20 milliamperes

Answer 2

We calculate current from the formula:

`I= (q)/(t)` , where q is a electric charge transferred over time t
Time should be converted to seconds:
1h 15 min= 75min= 4500s
I=
`(90C)/(4500s)=0,02A` Result is in unit-Ampere