You see, I always remembered the rule as 'minus minus equals plus' without truly visualising it. But when I began coaching, the tutor said to think of subtraction as facing left and the negative sign as turning you around. So subtracting negative means you turn *twice* — you end up facing right and moving forward. This clarity eluded me for decades because in my day, we just memorised rules. Now, plotting voltage drops and rises for the exam, I finally see the number line in every circuit diagram.
#exams#study
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