Interpreting magnetic flux vs. time graphs

[@eshaghazali2482]

THANKYOU FOR THIS. God bless you.

[@teresathom9241]

this has helped a lot, thanks

[@naomibarretto6325]

THANKS FOR THIS!!!

[@MoveToUSA]

Sir, is magnetic flux , phi a vector quantity ? If its not, how can we represent a negative value for magnetic flux as shown in the graph ?