figure 2.18 shows a circuit for an analog volmeter of very high input resistance that uses an inexpensive moving-coil meter.As shown,the moving-coil meter measures the voltage 1 applied between the op amp positive input terminal and ground.Assume that the moving coil produces full-scale deflection when the current passing through it is 100 we wish to find the value of R such full scale reading for 1 is +10 V