By definition, electric current is the amount of electric charge that flows through the cross-section of a conductor in a given unit of time:
I = (Delta Q)/(Delta t)
In SI (International System of units) the charge (Q) is measured in Coulombs, and the time is measured in seconds. The unit for current then equals 1 Coulomb/second, and it is called 1 Ampere, or, sometimes, 1 amp.
In this question, the amount of charge flowing through the heating element is
Delta Q = 2400 C in Delta t = 200 s . This means the current flowing through the heating element is
I = 2400/200 A = 12 A .
Please check out the reference website for the further discussion of the definition and units of measurement of electric current.
The current flowing through heating element is 12 A (Amps)
https://www.physicsclassroom.com/class/circuits/Lesson-2/Electric-Current
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