Electromagnetism
Current Electricity
MCQ (Single Correct Answer)
Moving Charges and Magnetism
MCQ (Single Correct Answer)
Magnetism and Matter
MCQ (Single Correct Answer)
Electromagnetic Induction
MCQ (Single Correct Answer)
Alternating Current
MCQ (Single Correct Answer)
Electromagnetic Waves
MCQ (Single Correct Answer)
Modern Physics
Dual Nature of Radiation
MCQ (Single Correct Answer)
Semiconductor Devices and Logic Gates
MCQ (Single Correct Answer)
Communication Systems
MCQ (Single Correct Answer)
1
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0
Out of Syllabus

An optical fibre communication system works on a wavelength of 1.3 $$\mu$$m. The number of subscribers it can feed, if a channel requires 20 kHz are

A
$$2.3\times10^{10}$$
B
$$1.15\times10^{10}$$
C
$$1\times10^{5}$$
D
None of these
2
COMEDK 2020
MCQ (Single Correct Answer)
+1
-0
Out of Syllabus

Ground waves have wavelength

A
less than that of sky waves
B
greater than that of sky waves
C
less than that of space waves
D
equal to that of space waves
COMEDK Subjects