Related Questions

If two sinusoids of the same frequency but of different amplitudes and phase angles are subtracted, the resultant is
A A sinusoid of the same frequency
B A sinusoid of half the original frequency
C A sinusoid of double the frequency
D Not a sinusoid
দেওয়া আছে (i) অর্ধপরিবাহীর Majority carrier election, (ii) p-type অর্ধপরিাবাহীর Majority carrier hole এবং (iii) pure অর্ধপিরবাহীর Majority carrier hole । নিচের কোনটি সঠিক?
A i ও ii
B ii ও iii
C i ও iii
D i, ii, ও iii
A form of modulation In which the amplitude of a carrier wave is varied in accordance with some characteristic of the modulating signal, is known as
A Aloha
B Angle modulation
C Amplitude modulation
D modem
E None of the above
The coherence length over which there is a strong relationship between amplitudes is;
A Directly proportional to the bandwidth
B Inversely proportional to the bandwidth
C The square of the bandwidth
D None of these
কোনটি মিথ্যা? i. ডায়োডের ক্ষেত্রে বিনাশী ভোল্টেজের পর তড়িৎ প্রবাহের মান সম্মুখ ঝোঁকে নী (Knee) ভোল্টেজের পর থেকে প্রাপ্ত তড়িৎ প্রবাহ থেকে বেশি না ii. ট্রায়োডের দুটি টার্মিনাল থাকে iii. +ve charge carrier এর জন্য প্রবাহিত তড়িৎ প্রবাহ-ve charge carrier জন্য প্রবাহিত তড়িৎ প্রবাহ থেকে কম না নিচের কোনটি সঠিক?
A i ও ii
B i ও iii
C ii ও iii
D i, ii ও iii
In Modulation, “carrier” is
A Resultant wave
B Speech voltage to be transmitted
C Voltage with constant frequency, phase or amplitude
D Voltage for which frequency, phase or amplitude is varied
For a given carrier wave, maximum undistorted power is transmitted when value of modulation is
A 1
B 0.8
C 0.5
D 0
In amplitude modulation, the ___________ of carrier is varied according to the strength of the signal.
A Amplitude
B Frequency
C Phase
D None of the above
As the modulation level is increased, the carrier power ___________
A Is increased
B Remains the same
C Is decreased
D None of the above
In case of frequency modulation, modulating voltage remains constant if the modulating frequency is lowered, then
A Amplitude of distant sidebands decreases
B Amplitude of distant sidebands increases
C Amplitude of distant sidebands remains constant
D Amplitude of distant sidebands first increases, then decreases

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