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Decide whether each of these statements is True (T) or False (F). Negative feedback with a...

Decide whether each of these statements is True (T) or False (F). Negative feedback with a control system is when: (i) The fed back signal is added to the input signal. (ii) The fed back signal is a measure of the output value of the control system. 1. (i) T (ii) T 2. (i) T (ii) F 3. (i) F (ii) T 4. (i) F (ii) F

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Answer #1

Closed-loop systems or feedback control system are designed to control a process parameter at a desired value. This is done by continuously measuring the outlet value of the parameter and generating a signal which is proportional to outlet value and sent it to the comparator. Now the comparator generates an error signal which is the difference between the output (measured variable) and the reference input (set point).

A Negative feedback with a control system means that measured value of the controlled variable will get subtracted from the setpoint value hence 1st statement is False

The fed back signal is a measure of the variable to be controlled not output value of the control system, hence 2nd statement is also False

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