For the Ohmmeter circuit shown in figure-1 (a), the full scale deflection current IFSD = 5...

 

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For the Ohmmeter circuit shown in figure-1 (a), the full scale deflection current IFSD = 5 mA, the meter internal resistance Rs = 400 Q and the Ohmmeter battery supplies 10 VDC. a) Calculate the total current (I.) with both leads shorted together. (2 marks) b) Determine the value for Rm, the zero-adjust resistor (to make the previous reading at zero Q). (3 marks) c) Calculate the value of Rx that will result in 35% of scale deflection (figure-1 b). (3 marks) d) Briefly explain the function of resistor Rm and its effect on the meter movement. (2 marks) Rs Rm R, A figure-1 (a) figure-1 (b) For the Ohmmeter circuit shown in figure-1 (a), the full scale deflection current IFSD = 5 mA, the meter internal resistance Rs = 400 Q and the Ohmmeter battery supplies 10 VDC. a) Calculate the total current (I.) with both leads shorted together. (2 marks) b) Determine the value for Rm, the zero-adjust resistor (to make the previous reading at zero Q). (3 marks) c) Calculate the value of Rx that will result in 35% of scale deflection (figure-1 b). (3 marks) d) Briefly explain the function of resistor Rm and its effect on the meter movement. (2 marks) Rs Rm R, A figure-1 (a) figure-1 (b)