Answer for E.C.E 1

Answers for  E.C.E  1  questions


   1.900-1800 Mhz

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  2. CMRR measures the tendency of an Op-amp to reject the signal at input as their might be a small percentage of input signal is necessary. 


                                    

                                        CMRR = 20log₁₀  A_d/A_cm

          

                    A_{d =} differential gain

                    A_{cm =} common mode gain

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3. Normal AM Broadcasting is done by Directional Antennas to reduce the change in broadcasting during day and night time.

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4.      Z₀= (R+jwL / G+jwC)^1/2

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5. if f(t) = cos wt

    Then

       F(S) = S/ (S² + W²)

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6. Metal oxide Varistor job is to conduct large current when Voltage is significantly high. They mainly used as a protective device against lightining strikes.

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7. Schottky Barrier Diodes

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8. Kernel is the important part of a operating system and is present between Application layer and actual Hardware components. It resides in main memory and hence supposed to be small in size. It's main function is Resource management and to communicate between hardware and software devices.

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9.  Problems associated with TCP/IP are

• Built for the wide Area
• Multiple layers
• Complicated memory management

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10. Polymorphism itself means 'many shapes'.This is the property by virtue of which variables takes on many shapes or many classes of objects.

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11. Fork( ) duplicates the current code. Using fork( ) code, we can control PID to check if the child or the parent is running right now.

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12. Raid is the method to combine many low quality hard disks to prepare a large capacity storage device. This method was started due to the inc. Data and costly hard drives in earlier time.

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13.  

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14. Fused Semiconductor 
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15. Generally 2 can do this, but without any communication between them. So for proper communication 3 are needed 120⁰  apart.
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16. All type home antenna or Dipole antenna or Yagi uda antenna.

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17.  1

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18. De-Morgan laws explain and and or relationship between 2 logic operators.

           

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19. In free space waves are propagated either in the form of radio waves, surface waves or sky waves. Air remains the medium effected by the impurities such as bad terrain.
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20. In class C amplifiers, current flows for less than half the cycle.




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