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JEE 2020: Semiconductor Electronics and Communication Quiz 2 (04.10.2019)
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Question 1
A square wave having amplitude 1V the carrier wave is , the modulation index
Question 2
An electromagnetic wave of frequency hertz is propagating along z-axis. The amplitude of electric field is 4 V/m. If then average energy density of electric field will be :
Question 3
The truth table given in fig. represents
Question 4
A carrier wave of peak voltage 14 V is used for transmitting a message signal. The peak voltage of modulating signal given to achieve a modulation index of 80% will
be :
be :
Question 5
The number of amplitude modulated broadcast stations that can be accommodated in a 300 kHz band width for the highest modulating frequency 15 kHz will be :
Question 6
The reading of the ammeter for a silicon diode in the given circuit is :
Question 7
In the given circuit, the current through zener diode is :
Question 8
For a common emitter configuration, if α and β have their usual meanings, the correct relationship between α and β is:
Question 9
To get an OR gate from a NAND gate, we need
Question 10
Initial LC oscillator frequency is 150Hz and inductance L=3H. If frequency is changed to 180Hz without changing the inductance, find the percentage change in capacitance of the circuit.
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Oct 4JEE & BITSAT