The Daniell cell is a battery which is named after the British chemist and meteorologist John Frederic Daniell, who invented it in 1836. The Daniell cell e.m.f. is 1.12 volt. This cell is used in experiments where a continuous and constant current is required. Construction The Daniell cell diagram is shown in figure 1. It consists … Read more
The Leclanche cell is a battery which is named after the French scientist Georges Leclanché who invented it in 1866. The Leclanche cell e.m.f. is 1.5 volt. The application of the Leclanche cell was in electric bells, signalling, and telegraphy. Construction Leclanche Cell consists of a glass vessel containing a saturated solution of ammonium chloride … Read more
In this article, we will see Star Delta Conversion and Delta Star Conversion. This conversion is widely used in the analysis of 3-phase electric power circuits. In simple words, it is used for the simplification of an electrical circuit in order to easily analyse the circuit. Star Delta Conversion In this section, we will see … Read more
A continuous-time signal is said to be a right-sided signal if there exists a T such that for all t < T, x(t) = 0. A discrete-time signal is said to be a right-sided signal if there exists a T such that for all n < T, x[n] = 0. A continuous-time signal is said … Read more
The energy of the continuous-time signal x(t) is given by Note: Here x(t) can be a real-valued signal or complex-valued signal. The energy of the discrete-time signal x(n) is given by Note: Here x(n) can be a real-valued signal or complex-valued signal. The power of the continuous-time signal x(t) is given by Note: Here x(t) … Read more
In this article, we will learn important terms in Economic Aspects of Power Generation. What is Load? A device which uses electrical energy is said to impose a load on the system. What is Connected Load? The sum of continuous ratings of all loads connected to the system is known as a connected load. What … Read more
Conjugate symmetric Signal is a signal which satisfies the relation f(t) = f*(−t). It is also known as even conjugate signal. Example-1 f(t) = ejt f(−t) = ej(−t) f*(−t) = e(−j)(−t) = ejt = f(t) Hence, f(t) = f*(−t) Example-2 f(t) = ejωot f(−t) = ejωo(−t) f*(−t) = e(−j)ωo(−t) = ejωot = f(t) Hence, f(t) = f*(−t) … Read more
Even signal is a signal which satisfies the relation f(t) = f(−t). Even signal is symmetric about the y-axis. Example: cost. f(t) = cost f(−t) = cos(−t) = cost Hence, f(t) = f(−t) Odd signal is a signal which satisfies the relation f(t) = −f(−t). Odd signal is symmetric about the origin. Example: sinωt. f(t) = … Read more
Real valued signal is a signal which assumes a real value for its amplitude for all instants of time. Examples are, cosωot, rect(t), u(t), r(t), δ(t), eat (a is a real value). Complex valued signal is a signal which assumes a complex value for its amplitude atleast at one instant of time. Example is ejωot Since … Read more
A static system is a system in which output at any instant of time depends on the input sample at the same time. In other words, the system in which output depends only on the present input at any instant of time then this system is known as the static system. A static system is … Read more
