Viva - I M.Sc.,

One example of the use of an S-R flip-flop is as ___________

• Transition pulse generator
  

• Racer

• Switch debouncer

• Astable oscillator

Which of the following is correct for a gated D-type flip-flop?

• The Q output is either SET or RESET as soon as the D input goes HIGH or LOW
  

• The output complement follows the input when enabled

• Only one of the inputs can be HIGH at a time

• The output toggles if one of the inputs is held HIGH

A basic S-R flip-flop can be constructed by cross-coupling of which basic logic gates?

• AND or OR gates
  

• NOR or NAND gates

• XOR or XNOR gates

• AND or NOR gates

Which of the following electrical characteristics is not exhibited by an ideal op-amp?

• 
  Infinite output resistance
  

• Infinite voltage gain

• Infinite bandwidth

• Infinite slew rate

Which factor determine the output voltage of an op-amp?

• Positive saturation

• Supply voltage

• Negative saturation

• Both positive and negative saturation voltage

Why open-loop op-amp configurations are not used in linear applications?

• Output reaches positive saturation
  

• Output reaches negative saturation

• Output switches between positive and negative saturation

• Output reaches both positive and negative saturation

The shape of the fringes observed in interference is ____________

• Straight

• Elliptical

• Circular

• Hyperbolic

When a plate of thickness 0.05 mm is placed in the path of a Michaelson Interferometer, a shift of 100 fringes is observed for a light of wavelength 5000 Å. What is the refractive index of the plate?

• 1
  

• 1.5

• 2

• 2.5

A square wave oscillator has f_o =1khz. Assume the resistor value to be 10kΩ and find the capacitor value?

• 3.9 µF
  

• 0.3 µF

• 2 µF

• 0.05µF

The value of series resistance in the square wave generator should be 100kΩ or higher in order to

• Prevent excessive differential current flow
  

• Increase resistivity of the circuit

• Reduce output offset voltage

• All of the mentioned