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Which of the following statements are correct with reference to superheterodyne receivers? (i) The main advantage of the superheterodyne receiver is its better tracking (ii) The main advantage of the superheterodyne receiver is an improvement in sensitivity (iii) The image channel rejection in superheterodyne receiver comes from IF stages only (iv) The image channel rejection in the superheterodyne receiver comes from the RF stage only Choose the correct answer from the code given below:
Directions : In each of the following questions a statement is given, followed by two conclusions. Give answer :

Statement : Of all the radio sets manufactured in India, the 'X' brand has the largest sale.

Assumptions :
I. The sale of all the radio sets manufactured in India is known.
II. The manufacturing of no other radio set in India is as large as 'X' brand radio.
A receiver is operated at a temperature of 300 K. The transistor used in the receiver have an average output resistance of 1 k. The Johnson noise voltage for a receiver with a bandwidth of 200 kHz is
In a receiver, if the noise figure of the mixer stage in the receiver is 7 dB, then the equivalent noise temperature is given that the receiver is operating at 290 K:
The sender asks the receiver what is to be sent to him (the receiver). He also takes care of the aspirations of the receiver while he designs and transmits the message. This is the chief guiding tenet of the
Why does the ionosphere of the Earth's atmosphere facilitate radio communication? i. The presence of ozone causes the reflection of radio waves to earth ii. Radio waves have a very long wavelength
A layer in the Earth's atmosphere called Ionosphere facilitates radio communication. Why? 1. The presence of ozone cause the reflection of radio waves to Earth. 2. Radio waves have a very long wavelength. Which of the statements given above is/are correct?
Ram goes to electronic shop to buy a T.V. and Radio. He bargains for a 10% discount on the Radio and 25% discount on T.V. However, the shopkeeper, by mistake, interchanged the discount percentage figures while making the bill and Ram paid accordingly. When compared to what he should have paid for his purchase he pay extra, what percentage did Ram pay extra if given that the Radio costs 40% as much as the T.V.
Which university launched its own Community Radio Station -- RADIO KHANCHI 90.4 FM Aap Sabka Radio on International Women's Day on 8 March 2020?
A radio station broadcasts its programme at 219.3 metre wavelength. Determine the frequency of radio waves if velocity of radio waves is 3×108 m/s.