Chapter 20: Problem 2680
Device which transform one form of energy in to another form of energy is called a (A) Transducer (B) Transformer (C) Transponder (D) Transistor
Chapter 20: Problem 2680
Device which transform one form of energy in to another form of energy is called a (A) Transducer (B) Transformer (C) Transponder (D) Transistor
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Get started for freeIn optical fiber communication, the APD semi conductor device is used (A) to convert radio signal into optical signal. (B) to obtain intensity modulated signal (C) to covert optical signal into electrical signal (D) to covert optical signal into radio signal.
The refractive index of the ionosphere (A) increase as we go from the lower to upper layer of the ionosphere (B) decrease as we go from the lower to upper layer of the ionosphere (C) remain the same through out the ionosphere (D) is equal to unity
Wave impedance of free space is (A) Zero (B) \(376.6 \Omega\) (C) \(33.6 \Omega\) (D) \(3.76 \Omega\)
Type of communication Possible by Modem duplex is (A) Half duplex (B) Simplex (C) Double Duplex (D) Full duplex
An antenna can transmit \(\quad\) radiation with more efficiency. (A) low frequency (B) high frequency (C) long wave length (D) None of these
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