You work as an electrical maintenance engineering apprentice. You Q5: have been tasked with diagnosing a faulty production line as the it is known that there is an issue with the control circuitry. First of all you need to check the EMF of the circuit and its current. (i) The EMF in an electric circuit in time t seconds is given by the equation: V = 80e-2t a) Plot the graph of t horizontally and Vvertically for values of t from 0 to 0.5 seconds b) Using the graph estimate the gradient of the curve at the point where t = 0.3 seconds and, hence, the rate of decay of the EMF at this point c) Check your estimate using differentiation