How many times more, the mass of the original star is to be larger than that of the sun for the formation of Black Hole?

A star whose mass is 5 times or more than five times the mass of the sun but size very small is called black hole.

How many times more, the mass of the original star

Top Questions on communication systems

List I		List II
A.	Attenuation	I.	Combination of a receiver and transmitter
B.	Transducer	II.	Process of retrieval of information from the carrier wave at received
C.	Demodulation	III.	Converts one form of energy into another
D.	Repeater	IV.	Loss of strength of a signal while propagating through a medium

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JEE Main - 2023
Physics
communication systems

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A modulating signal is a square wave, as shown in the figure If the carrier wave is given as $c ( t )=2 \sin (8 \pi t)$ volts, the modulation index is:
- JEE Main - 2023
- Physics
- communication systems
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Match List I with List I:
List I List II
A AM Broadcast I 88-108 MHz
B FM Broadcast II 540-1600 kHz
C Television III 3.7-4.2 GHz
D Satellite Communication IV 54 MHz-890 MHz

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- JEE Main - 2023
- Physics
- communication systems
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What should be the minimum size of antenna required for successful transmission of wave having wavelength $\lambda$
- JEE Main - 2023
- Physics
- communication systems
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The height of the antenna is 98 m. The radius of Earth is 6400 km. The area up to which it will transmit signal is:
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- Physics
- communication systems
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Questions Asked in EAMCET exam

If $\quad \tan \theta \cdot \tan \left(120^{\circ}-\theta\right) \tan \left(120^{\circ}+\theta\right)=\frac{1}{\sqrt{3}}$, then $\theta$ is equal to
- EAMCET - 2015
- Trigonometric Equations
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If $f: R \rightarrow R, g: R \rightarrow R$ are defined by $f(x)=5\, x-3, g(x)=x^{2}+3$, then $g o f^{-1}(3)$ is equal to
- EAMCET - 2015
- Differentiability
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The common roots of the equations $z^{3}+2 z^{2}+2 z+1=0, z^{2014}+z^{2015}+1=0$ are
- EAMCET - 2015
- Quadratic Equations
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The value of the sum $1 \cdot 2 \cdot 3+2 \cdot 3 \cdot 4+3 \cdot 4 \cdot 5+\ldots$ upto $n$ terms is equal to
- EAMCET - 2015
- Sum of First n Terms of an AP
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The system $2\,x+3 y+z=5,3\,x+y+5\,z=7$ and $x+4\,y-2\,z=3$ has
- EAMCET - 2015
- Transpose of a Matrix
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Concepts Used:

Communication Systems

A system that describes the information exchange between two points is called the communication system. The transmission and reception process of information is called communication. The major elements of communication are such as:

The Transmitter of information
Channel or medium of communication
The Receiver of information

Examples Of Communication Systems:

The following are the examples of communication systems:

Internet
Public Switched Telephone network
Intranet and Extranet
Television

Types Of Communication Systems:

Turning on Signal specification or technology, the communication system is categorized as follows:

Analog technology communicates data as electronic signals of differing frequencies or amplitude. For instance Broadcast and telephone transmission.
In Digital technology, the data are created and processed in two states: High (represented as 1) and Low (represented as 0). Also this technology stores and transmits data in the form of 1's and 0's.