This chapter is currently out of syllabus
1
JEE Main 2021 (Online) 26th February Evening Shift
Numerical
+4
-1
Out of Syllabus
If the highest frequency modulating a carrier is 5 kHz, then the number of AM broadcast stations accommodated in a 90 kHz bandwidth are _________.
2
JEE Main 2021 (Online) 26th February Morning Shift
Numerical
+4
-1
Out of Syllabus
The maximum and minimum amplitude of an amplitude modulated wave is 16V and 8V respectively. The modulation index for this amplitude modulated wave is x $$\times$$ 10$$-$$2. The value of x is __________.
3
JEE Main 2021 (Online) 24th February Evening Shift
Numerical
+4
-1
Out of Syllabus
A signal of 0.1 kW is transmitted in a cable. The attenuation of cable is $$-$$5 dB per km and cable length is 20 km. The power received at receiver is 10$$-$$x W. The value of x is ________.

[Gain in $$dB = 10{\log _{10}}\left( {{{{P_o}} \over {{P_i}}}} \right)$$]
4
JEE Main 2021 (Online) 24th February Morning Shift
Numerical
+4
-1
Out of Syllabus
An audio signal vm = 20 sin 2$$\pi$$(1500t) amplitude modulates a carrier vc = 80 sin 2$$\pi$$(100,000t).

The value of percent modulation is _________.