BEE Lab Cycle 1 Quiz

An inverter performs an operation known as

• assertion

• inversion

• complementation

• both (a) and (c)

Which of the following two input logic functions can act as a Universal gate?

• 
  A ⊕ B

• 
  (A+B)’

• None of these

A NAND gate is called a universal logic element because

• All digital computers use NAND gates

• All the minimisation techniques are applicable for optimum NAND gate realisation

• 
  Everybody use this gate

• Any logic function can be realized by NAND gates alone

Ex-OR gate can work as NOT gate provided

• 
  One input is fixed at logic level 1

• One input is fixed at logic level 0

• 
  By shorting both inputs

• none of these

when a Diode is used as a half wave rectifier ....

• It rectifies only one half of the input AC signal

• It rectifies both the halves of the input AC signal

The function of rectifier is

• 
  To increase or decrease the AC voltage in a circuit

• 
  Converting the AC voltage into pulse DC voltage

• Smooth out the ripple contained in the pulses of pulse DC voltage

• Maintain a constant DC voltage output across a load

The number of diodes used to build a bridge rectifier

• 1

• 2

• 4

• 3

A simple diode rectifier has ‘ripples’ in the output wave which makes it unsuitable as a DC source. To overcome this one can use

• 
  A capacitor in series with a the load resistance

• A capacitor in parallel to the load resistance

• 
  Both of the mentioned situations will work

• None of the mentioned situations will work

Efficiency of a centre tapped full wave rectifier is _________

• 41%

• 81.2%

• 60%

• 58.64%

What is the INPUT impedance of an IDEAL amplifier?

• 
  0 Ω

• 
  1 000 Ω

• 
  100 Ω

• infinite