In the ohmmeter in Fig. M is a 2.50-rnA meter of resistance 65.0 Ω. (A 2.50-. mA meter deflects full scale when the current through it is 2.50 mA.) The battery B has an emf of 1.52 V and negligible internal resistance. R is chosen so that when the terminals a and b are shorted (Rx = 0), the meter reads full scale. When a and b are open (R. = 00), the meter reads zero.
(a) What is the resistance of the resistor R?
(b) What current indicates a resistance Rx of 200 Ω?
(c) What values of Rx correspond to meter deflections of ¼, 1/2 and 3/4 of full scale if the deflection is proportional to the current through the galvanometer?

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M) Rx