Question

A wire delivers 120 C of charge in 40 s.

Answer 1

Answer:

3 A

Explanation:

Charge is a product of current and time, expressed as Q=It where Q is charge in Coulombs, I is current in Amperes and t is time taken in seconds. Making I the subject of the formula then $I=\frac {Q}{t}$

Substituting 120 C for charge and 40 s for t then$I=\frac {120}{40}=3\ A$

From the choices given, it appears that time should have been 4 s to get option A or alternatively charge should have been 1200 C