Computer and Microprocessor

6)What is an operational amplifier?
A very high gain direct coupled amplifier with feedback. A high gain amplifier indirectly coupled without feedback. A low gain amplifier without feedback. None of the above.

7)In an ideal operational amplifier the output impedance should be zero. In practice it is in the range of:
Few hundred ohms to few kilo ohms. Few ohms to a few hundred ohms. Few kilo ohms to few mega ohms. Few milliohms to one ohm.

8)How can noise be reduced in an operational amplifier?
Shielding. Attenuation to grounding Use of low pass filters on incoming power leads. All of the above

9)The use of OPAMP is generally not preferred as:
Divider. Subtractor. Differentiator. Integrator

10) Feedback in an amplifier that:
Increases sensitivity and reduces gain Increases sensitivity as well as gain. Reduces sensitivity as well as gain. Reduces sensitivity and increases gain.

Computer and Microprocessor

1.What is a 4-bit data world called?
Data bus Byte Band Nybble

2.A sequential logic circuit has ……………….as feedback element
Memory Delay Either of the above None of the above

3.In a sequential logic circuit the output is a function of ………..inputs and ……….history of the inputs
Present, previous Future, past Future, present Present, future

4.A sequential circuit is combinational circuit with feedback elements as
Accumulators Shift registers Counters All of the above

5.What are the outputs of flip-flop?
Logically inverse of each other Multiple of input Sum of the inputs. Any of the above