2 Look at the schematic diagram in the figure above The osci

2. Look at the schematic diagram in the figure above. The oscillator shown generates a sine wave with a small DC component. The waveform produced by the oscillator is shown on the oscilloscope. The thermistor in the circuit has a positive temperature coefficient. What will happen to the waveform of this circuit if the temperature rises?

A. The waveform will drift downward on the oscilloscope screen.

B. The waveform will drift upward on the oscilloscope screen.

C. The amplitude of the waveform will decrease.

D. The amplitude of the waveform will increase.

Solution

The correct option is (D)

The amplitude of the waveform will increase if the temperature rises because thermistor in the circuit has a positive temperature coefficient which is very sensitive.