Classical Fields (Responses)

	A	B	C	D	E	F	G
1	Timestamp	Email Address	Name	1. What is meant by a field in Physics?	2. Give one or two examples of fields you may have come across.	3. Give two examples physical systems which are not fields.	Score

2	10/8/2020 17:41:42	shailesh.pincha@gmail.com	Shailesh Pincha	Field is a mathematical entity spread out in space that takes on different values at different times. For eg, Electric Field due to a point charge takes different and decreasing values with increasing distance from the charge. These values describe the nature of Electromagnetic interactions of the source charge with some other charged entity.	Electric Field. Gravitational Field	Every physical system has a value in whole space, so I can't think of any physical system that is not a field, be it an electron or a Space Shuttle.
3	10/8/2020 18:00:29	nmnphy20@gmail.com	Naman Agarwal	A field is simply a quantity that has a value at each point of space and time (in general) in the region in which the field exists. Fields could be a scalar, vector, tensor or spinor fields, i.e. we could have a scalar or a vector (in the natural sense of the word), or a tensor or a spinor for that matter, defined at each point in spacetime.	Scalar field- Temperature field in a room, pressure in a fluid (taking the fluid as a continous system); Vector Field- Electric field, magnetic field; Tensor field- stress-energy tensor field, Maxwell Tensor field. I don't know an example for a spinor field (have just heard the jargon).	Fields are really special physical systems and are characterized by their continuous nature. Systems involving particles work on particle dynamics (i.e their dynamical variables are spatial position and momenta rather than field variables which are functions of space and time). So I think, for example, two particles colliding with each other is a physical system which don't involve fields.
4	10/8/2020 18:31:07	sk54@iitbbs.ac.in	SHUBHAM KUMAWAT	The region in which every point is affected by some force.	Gravitational field, Electromagnetic field	Don’t know
5	10/8/2020 20:26:39	yuvikthakre@gmail.com	Akshay	The Field is the region which is conceptualize to understand to non contact forces. Its a mathematical quantity which we associate with a region. It can be scaler field ,vector field.	Electric field, temperature field.	Sorry sir but No idea .
6	10/8/2020 21:43:31	leekv95@yahoo.com	Lee KV	a quantity that has a value/magnitude at every point in space (and has a direction too, if it's a vector field). there are also tensor fields which assign a tensor to each point in space...	E and B fields (vector fields), temperature field (scalar field)...	a physical system like particles moving along a trajectory that is adequately described by a coordinate/ a finite number of coordinates do not need to be described by fields (which need infinite numbers of coordinates). thermodynamic systems also can be characterized by a macroscopic quantity, ignoring the real value of the quantity at each point in space.
7	10/8/2020 21:58:05	arunkumarkanakati@gmail.com	Arun Kumar Kanakati	Field is a physical quantity and if we apply field on any object it will perturb the system accordingly.	magnetic field and gravitational field	exactly I do not no
8	10/9/2020 8:01:45	eramya29@gmail.com	Dr E Ramya	The region in which, each point is affected by the force	Magnetic and electric fields	Mechanical and optical
9	10/9/2020 10:35:08	karshashikanta7@gmail.com	Shashikanta kar	A field is something that has a well defined value at every point in space.	Space-time	.
10	10/9/2020 11:33:07	pradoshbasu4u@gmail.com	Pradosh Basu	In physics field is a physical quantity that has a specific value at each point of space and time.	Temperature field, Magnetic field etc.	Simple harmonic oscillator, moving objects
11	10/9/2020 12:53:16	rithishbarath85@mail.com	Rithish Barath	A field is a functional which takes position as input and gives a output as a scalar, vector , tensor or a complex number as output.It gives different output in different points in a spacetime	Gravitational field and electromagnetic field	This is tricky question sir I can only think of output of a constant function. In physical field if we restrict our area of interest to a particular point in space time we can get many examples of systems which are not fields. For example im defining an action integral at one point in space time and im claiming as the whole area of interest.
12	10/9/2020 13:03:38	mtvrao@gmail.com	Trivikram Rao Molugu	A region in which particles experience a force based on position or polarity.	Electric, Magnetic and Gravitational fields	I couldn't answer
13	10/11/2020 7:54:09	souvikghoshbandel1@gmail.com	SOUVIK GHOSH	Field is a physical quantity that has certain value at each point any where in space and time .....	Gravitational field , electric field	Sorry sir I have no idea about this
14	10/11/2020 10:43:11	ashikh316@gmail.com	ASHIK H	Field is a massless entity which can exist in space. A simple example is that of electric field. We observe that two charges attract or repel. So how do they do it almost instantaneously? Thus we introduce the concept of electric field. So each charge creates a field around it and this field can excert force on the other charges. Or we can say that field of one charge interacts with field of the other, causing attraction or repulsion.	Elecromagnetic fields	A football, an electron.
15	10/11/2020 15:32:47	nkrishna88@gmail.com	Krishna Reddy Nandipati	Field quantifies the force acts on a test due to a source, and associates values for all the infinite number of points (in spacetime) that lie between source and a test.	Electric and magnetic fields.	sound waves and water waves.
16	10/11/2020 15:56:59	dattashaoni@gmail.com	SHAONI DATTA	a region where each point a function of space and time is affected by a force	gravitational field , electric field	Classical system , quantum system
17	10/11/2020 16:08:18	sumanpanja19@gmail.com	Suman Kumar Panja	Fields (Action at a distance) in Physics, is simply an entity which has value at every point or which is spread out in a region with values at every point of that region or space.	Scalar Fields (Temperature of Body) and Vector Fields ( ElectroMagnetic Fields)	Any system under damping or drag force i,e under contact force. Friction, Damping.
18	10/11/2020 17:33:08	k.n.krishnakanth@uohyd.ac.in	Naga Krishnakanth Katturi	infinite degrees of freedom	electric field, magnetic field, gravitational	spring mass system, harmonic oscillator
19	10/14/2020 17:03:20	tiyasakar.102@gmail.com	Tiyasa Kar	Field is a continuous entity that has a value for particular times.	Electromagnetic field, momentum field	Discrete systems like throwing ball in a basket, tossing a coin
20	11/28/2020 9:19:01	akkhcu@gmail.com	A K Kapoor	A field is a system with infinite degrees of freedom. Many fields are systems with generalized coordinates depending on a continuous variable like coordinates of space points.	Gravitational field, Vibrating string	Simple pendulum, projectile
21	12/10/2020 13:46:40	abuthahir@gces.edu.in	Abuthahir	Forces are termed as field. Incase, Four fundamentals force has there respective fields.	Electromagnetic fields, Gravitational fields	Fermions makes matter or antimatter, incase field are consist of bosons.
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100