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Name the logic gate which generated high output when at least one input is high.
Concept: Digital Electronics and Logic Gates
Distinguish between p-type and n-type semiconductors.
Concept: Properties of Solids: Electrical Properties >> Applications of n-type and p-type Semiconductors
What is the ratio of octahedral holes to the number of anions in hexagonal closed packed structure?
Concept: Properties of Solids: Electrical Properties >> Applications of n-type and p-type Semiconductors
The process of superimposing a low frequency signal on a high frequency wave is_______ .
Concept: Modulation and Its Necessity
The power radiated by linear antenna of length T is proportional to........................
(λ= wavelength)
- `lambda/ l`
- `[lambda/l]^2`
- `l/lambda`
- `[l/lambda]^2`
Concept: Need for Modulation and Demodulation
Define modulation and transducer
Concept: Modulation and Its Necessity
The process of regaining of information from carrier wave at the receiver is called .................
(a) modulation
(b) transmission
(c) propagation
(d) demodulation
Concept: Need for Modulation and Demodulation
Draw a neat, labeled diagram showing different layers of the Earth’s atmosphere.
Concept: Production and Detection of an Amplitude Modulated Wave
From earth's surface, ionospheric layer of atmosphere lies between ............
(a) 12 km to 50 km
(b) 50 km to 80 km
(c) 80 km to 400 km
(d) 400 km to 700 km
Concept: Space Communication
Explain the need for modulation related to the size of antenna (aerial).
Concept: Modulation and Its Necessity
