Checked by:_______________ Rechecked by:_____________ Sign Invigilator:_____________
Q1. Circle the correct answer. (10)
1.The process of emission of electrons from the hot metal surfaces is called:
a) electronic emission b) thermeonic emission c) field emission d) none of these
2.X=A.B is read as:
a) X = A AND B b) X = A OR B c) X = A NOT B d) X = A NAND B
3.Which of the following is not an is example of an analogue quantities?
a) temperture b) time c) pressure d) none of these
4.AND operation is represented by:
a) + b) – c) * d) x
a) analogue into a digital signal b) digital into a analogue signal
c) conventional into actual current d) anode into cathode
6.The process of transforming information into ‘1s’ and ‘0s’ is called:
a) digitization b) ionization c) logic operation d) electricity
7.Digital electronics are preferred to analogue electronics because of:
a) loss of strength of signal in analogue electronics b) excellent picture quality c) storage of large amount of data in a small d) all of these
8.Those quantities whose values vary non-continuous manner are called.
a) variable b) current c) analogue d) digital
9.Which of the following is a digital device:
a) a moving coil voltmeter b) a microphone generating current
c) central heating thermostat d) automatic traffic lights
10.Temperature is a ………………quantity.
a) digital b) analogue c) constant d) vector
Q2. Write short answers to these questions: (15)
1.What is NOT operation? Write down its truth table and draw its symbol.
2.What happen when a narrow beam of electrons is passing through a uniform magnetic field.
3.Considering an Oscilloscope, explain why filament is heated?
4.Write down the names of universal logic gates.
5.Explain briefly the working parts of CRO.