All posts by mcqsadmin

Elactrical, Electronics, Theory

Resistivity Calculation

Resistivity Calculation – The electrical resistance of a wire would be expected to be greater for a longer wire, less for a wire of larger cross sectional area, and would be expected to depend upon the material out of which the wire is made (resistivity). Experimentally, the dependence upon these properties is a straightforward one for a wide range of conditions, and the resistance of a wire can be expressed as

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Elactrical, Electronics, Theory

Resistance and Conductance

Resistance and Conductance

Resistance

The electrical resistance of a circuit component or device is defined as the ratio of the voltage applied to the electric current whichflows through it:

 

If the resistance is constant over a considerable range of voltage, then Ohm's law,

I = V/R, can be used to predict the behavior of the material. Although the definition above involves DC current and voltage, the same definition holds for the AC application of resistors.

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Electronics mcqs

Mcqs Electronics Engineering

Mcqs Electronics Engineering

1. When four resistances of 2W 1W; 5W 2W; 10W 5W and 15W 10 W are connected in parallel, the greatest power is absorbed by

  • 2 W, 1 W
  • 5 W, 2 W
  • 10 W, 5W
  • 15 W, 10 W

2. A moving coil instrument has a resistance of 10 W and gives full scale deflection when carrying a current of 50 mA.  To measure current upto 100 A, we will have to connect

  • 10 W resistance in series
  • 10 W resistance in parallel
  • 10/1999 W resistance in series
  • 10/1999 W resistance in parallel

3. The ripple voltage in the output of a single phase half wave rectifier with 10 V rectified dc voltage with resistive load and without filter will be

  • 12.1 volt
  • 1.21 volt
  • 0.482 volt
  • 4.82 volt

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EC Engineering mcqs, Engineering Mcqs

Mcqs in Wave propagation

Mcqs in Wave propagation

  1. A 'skip zone' is:

    1. the distance between the antenna and where the refracted wave first returns to earth
    2. the distance between the far end of the ground wave and where the refracted wave first returns to earth
    3. the distance between any two refracted waves
    4. a zone caused by lost sky waves
  2. The medium which reflects high frequency radio waves back to the earth's surface is called the:

    1. biosphere
    2. stratosphere
    3. ionosphere
    4. troposphere
  3. The highest frequency that will be reflected back to the earth at any given time is known as the:

    1. UHF
    2. MUF
    3. OWF
    4. LUF Continue reading Mcqs in Wave propagation →
EC Engineering mcqs, Engineering Mcqs

MCQs in Radio Engineering Part -1

MCQs in Radio Engineering (Electronics and Communication Engineering) Test Paper

Choose the correct answer

1. Output power of 10 kW FM transmitter modulated with 1 Khz sinusoidal tone with deviation of + 75 kHz shall be

  • 10 kW
  • 15 kW
  • 7.5 kW

2. Adaptive pre-emphasis in FM limiter is

  • Independent of frequency.
  • Dependent on frequency.
  • Independent of level.
  • Dependent on level.

3. The feeder used to connect the FM Transmitter to the antenna is

Electronics mcqs

Mcqs in Basic Electronics

1 Comment

Mcqs in Basic Electronics​ test paper

 1.When four resistances of 2W 1W; 5W 2W; 10W 5W and 15W 10 W are connected in parallel, the greatest power is absorbed by

  • 2 W, 1 W         
  • 5 W, 2 W         
  • 10 W, 5W        
  • 15 W, 10 W

 2. A moving coil instrument has a resistance of 10 W and gives full scale deflection when carrying a current of 50 mA.  To measure current upto 100 A, we will have to connect  

  • 10 W resistance in series
  • 10 W resistance in parallel
  • 10/1999 W resistance in series
  • 10/1999 W resistance in parallel

Continue reading Mcqs in Basic Electronics →

EC Engineering mcqs, Electronics mcqs, Engineering Mcqs

Broadcast Engineering Short Answers 1

Electronics and Communication Engineering Short answers

(Broadcast Engineering)

  • The repealer electrode in a reflex  is at                         potential.
  • The junction capacitance of a diode is made up of  a                       
  • The ripple frequency of a 50 Hz, 3 phase full wave rectifier is                       Hz.
  • Main advantage of grounded grid amplifier is                       
  • In a push pull amplifier                        harmonic are absent.
  • If two amplifiers of gain 10 are cascaded, the overall gain will be                
  • A rejector circuit offers                         reactance above resonance.
  • The filter used in the first stage of AF chain is usually                          pass.
  • The crystal of an oscillator is placed in order to                    
  • In a 10KW transmitter if the modulation index is 0.5, the total side band power is                
  • The detector used in an FM receiver is                     
  • The digital gate used for the logic "This or that but not both" is                     
  • ROM is a                      memory in terms of relativity.
  • A negative logic means                     
  • If a 20 kHz audio is to be sampled in A/D convertor, the minimum sampling frequency shall be                 for faith full reproduction.
  • The most common modulation scheme used in a digital satellite communication system is                       
  • In a computer hardware BIOS stands for                 
  • A spectrum analyzer is a                     domain equipment.
  • A geo-stationary orbit is approximately at                   km height.
EC Engineering mcqs, Engineering Mcqs

EC Engineering MCQs Paper 2

EC Engineering MCQs​

Electronics and Communication Engineering  Test Paper

Choose the correct answer

1. The output power of an audio power amplifier is 12 W, which is approximately

a) 20 dBm                   b) 41 dBm                   c) 62 dBm                   d) 86 dBm

2. The bandwidth of a wide-band amplifier to reproduce a pulse faithfully depends on

a) Width of the pulse                                       b) Rise time of the pulse        
c) Frequency of the pulse                               d) All of these

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