The diagram shows a uniform resistance wire MN of length 100.0cm which is connected to a standard cell of e.m.f. 1.5V and of negligible internal resistance. The circuit is completed with a cell of e.m.f. E, a sensitive galvanometer and a slider P, as shown. When no current flows through the galvanometer, what is the value of E?

A0.6V

B0.9V

C6.0V

D9.0V

ZIMSEC Physics Paper 1, June 2003, Q17

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