47) Which one of the following statements is true of phase shift type and Wein bridge type R.C. oscillators ?

Both use positive feedback

The former uses positive feedback only, whereas the later uses both positive and negative feedback.

The former uses both positive and negative feedback only whereas later uses positive feedback

Both use negative feedback

Answer is:

The former uses positive feedback only, whereas the later uses both positive and negative feedback.

a switching device

a resistor

a capacitor

all of the above

Answer is:

monostable multivibrator

astable multivibrator

bistable multivibrator

none of the above

Answer is:

an astable multivibrator

a bistable multivibrator

a monostable multivibrator

none of the above

Answer is:

quartz

Rochelle salt

aluminium

carbon

Answer is: