Communication Systems · Physics · AIIMS
MCQ (Single Correct Answer)
1
If modulation index, $$\mu=\frac{1}{2}$$ and $$V_m=2$$, then $$V_C$$ is
AIIMS 2019
2
Assertion : In ionospheric reflection, phase change does not occur with the radio wave.
Reason : The ionosphere reflection is similar to the total internal reflection in miraj.
AIIMS 2019
3
Assertion : Amplitude modulation shows more interference than frequency modulation with noise.
Reason : Interference is function of amplitude of modulation wave with carrier-wave.
AIIMS 2019
4
A diode detector is used to detect and amplitude modulated wave of 60% modulation by using a condenser of capacity 250 pF in parallel with a load resistance 100 k$$\Omega$$. Find the maximum modulated frequency which could be detected by it.
AIIMS 2018