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6 marksOperational Amplifiers

CAPE Physics Unit 2 · 2016 · Paper 2 · Question 2(a)

Analysis and operational amplifier circuits.

Draw the circuit diagram and derive the expression for the gain of a non-inverting amplifier.

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  1. 2(b)The circuit shown in Figure 3 is used in a tester for resistive transducers. Show that output voltage V_o and R_x are related by the equation…[2 marks]
  2. 2(c)(i)Complete Table 2 by inserting the appropriate values in Column 2 for R_x^{-1} (10^{-3}).[1 mark]
  3. 2(c)(ii)On the grid provided in Figure 4, plot a graph of V_o versus R_x^{-1} and draw the best straight line through the points.[4 marks]
  4. 2(d)Use your graph to determine the value of R_x which results in zero output voltage.[2 marks]

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