Refer to figure 3-27 in answering Q31 through Q33.

Figure 3-27. - Circuit for Q31 through Q33.

Q.31 What type of circuit is figure 3-27?
Q.32 If: E1 = +2VAnd: E2 = +6VThen E_out = ?
Q.33 What is the difference in potential between the inverting (-) and noninverting (+) inputs to the operational amplifier when:E1 = +6VandE2 = +2V
Q.34 What is the difference between a subtractor and a difference amplifier?
Q.35 Can a difference amplifier have more than two inputs?