A prime example of matrices (plural) being used in computers if in computer graphics and rendering where matrices are used in 3D work for transformations like rotation, scaling and translations. Although I'm sure there are plenty more fields in computer science where matrices may be used.
Electrical symbols are used in electrical wiring diagram, signage on the electrical devices and motors
An electrical safety device that can be reset and used again fits the description of an electrical circuit breaker.
an ohm meter OR multimeter is used to measure the electrical resistance...
An electrical prefix is a type of prefix that is used in electrical or electronic engineering. They are used for defining many values without using a bunch of zeros.
Isolation,and it blocks DC Voltage
Matrices were used to organize data.
Matrices are tools to solve linear equations. Engineers use matrices in solving electrical problems in circuits using Thevenin's and Norton's theories.
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Let me correct you: two-dimensional arrays are used in programming to represent matrices. (Matrices are objects of mathematics, arrays are objects of programming.)
The method must be of pretty high quality if it can be used for a variety of matrices.
I suggest asking separate questions for complex numbers, and for matrices. Complex numbers are used in a variety of fields, one of them is electrical engineering. As soon as AC circuits are analyzed, it turns out that complex numbers are the natural way to do this.
Matrices can be used for circuit analysis because a circuit component can have an impedance matrix, an admittance matrix or a scattering matrix, of order equal to the number of ports the circuit has. This can also be used for antenna arrays when you have an antenna circuit connected to a feeder (transmission-line) circuit. Matrices are also used in the numerical solution of linear equations: when you have a system of N equations it needs matrices of order N. In field theory integral equations arise which can be solved numerically by using a piecewise-linear approximation which turns an integral equation into a set of linear equations. This is used for analysing raio antennas using the method of moments. All the above applications are coded into software which can be bought and used but designing the sotware falls inside the remit of electrical engineering.
A prime example of matrices (plural) being used in computers if in computer graphics and rendering where matrices are used in 3D work for transformations like rotation, scaling and translations. Although I'm sure there are plenty more fields in computer science where matrices may be used.
If you have a system, which can be expressed as a set of linear equations, then you can utilize matrices to help solve it. One example is an electrical circuit which uses linear devices (example are constant voltage sources and resistive loads). To find the current through each device, a set of linear equations is derived.
Matrices are used to figure who is seeded in a contest like the NCAA basketball final four. Matrices are used in any calculation that has to do with multiple variables. In business the maximum that you charge for a ticket and make the most money, I have used matrices.
Unless your "everyday life" involves work in some area of engineering, you won't use matrices in your everyday life.