K.C.S.E Physics Q & A - MODEL 2003PP2QN05

K.C.S.E Physics Q & A - MODEL 2003PP2QN05

a) States what is meant by electromotive force (em.f) of battery.
b) The graph in figure 5 shows the terminal voltage, V, of a certain battery varies with the current, I, being drawn from the battery.

​(i) Write an expression relating the e.m.f. E, terminal voltage, V, current, I and the internal resistance, r, of the battery for the circuit drawn in
(i) above.
(iii) From the graph determine the; I internal resistance, r, of the battery.
(C) A galvanometer of resistance 10ohms gives a full-scale deflection when a current of 0.03A flows through it. Determine the resistance of the resistor, which would be required to convert the galvanometer to an ammeter reading up to 3.0a

answers