Calculate the amount of charge in Amp*seconds

[dbag123]

Homework Statement

there is a 1 A current in a wire and after 0s the current begins to rise 1A/s for 4 seconds, then the current continues for another 3 seconds. How many coulombs in total?

Relevant Equations

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Step 1 make a graph y-axis = current in amperes and x-axis = time in seconds
step 2 beginning from 1A there is a slope of 1A/s for 4 seconds and then no change for another 3s
step 3 the amount of coulombs is equal to the area under that graph, so 27 coulombs? is it right?

 

[jbriggs444]

Step 1 make a graph y-axis = current in amperes and x-axis = time in seconds
step 2 beginning from 1A there is a slope of 1A/s for 4 seconds and then no change for another 3s
step 3 the amount of coulombs is equal to the area under that graph, so 27 coulombs? is it right?

Yes. Nicely explained and correctly calculated.

 

[dbag123]

thank you very much