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.The process of transforming information into ‘1s’ and ‘0s’ is called:
a) digitization b) ionization c) logic operation d) electricity
3.Temperature is a ………………quantity.
a) digital b) analogue c) constant d) vector
4.Which of the following is a digital device:
a) a moving coil voltmeter b) a microphone generatingcurrent
c) central heating thermostat d) automatic traffic lights
5.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
a) analogue into a digital signal b) digital into a analogue signal
c) conventional into actual current d) anode into cathode
7.Those quantities whose values vary non-continuous manner are called.
a) variable b) current c) analogue d) digital
8.AND operation is represented by:
a) + b) – c) * d) x
9.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
10.Which of the following is not an is example of an analogue quantities?
a) temperture b) time c) pressure d) none of these
Q2. Write short answers to these questions: (15)
1.What happen when a narrow beam of electrons is passing through a uniform magnetic field.
2.Considering an Oscilloscope, explain why filament is heated?
3.Explain briefly the working parts of CRO.
4.Write down the names of universal logic gates.
5.What is NOT operation? Write down its truth table and draw its symbol.