Eccentric vs Concentric
Eccentric and Concentric are two words that are often confused in terms of their meanings and connotations. The two words are related to the contractions of the muscle. They are both types of isotonic contraction. When the muscle shortens to move a load then the muscle undergoes concentric contraction.
A bicep curl is one of the best examples of a concentric contraction. While holding a weight too, a man has to bend his elbow thereby, resulting in what is called concentric contraction. In other words, concentric contraction is all about muscular movement. The forearm gets pulled along with the weight in the case of concentric contraction.
The biceps brach would shorten its movement during the course of concentric contraction. Inefficient muscle use results in the other type of isotonic contraction called as the eccentric contraction. In short, it can be said that both concentric and eccentric type of muscle contraction is tried and practiced by the weight lifter during his workouts at the gym during body building exercises.
Hence, both these terms are associated with body building and weight lifting. If the muscle lengthens under contraction it amounts to eccentric contraction. Hence, eccentric contraction is exactly the opposite of concentric contraction. If the weight is too heavy to hold then the weight lifter feels that it is beginning to fall under control. This results in eccentric contraction.
It is important to note that the brachialis and biceps begin to contract trying to hold the extra weight. On the other hand, although the biceps try to hold the extra weight, they are unable to produce the extra force to hold the weight long, and hence, they give way resulting in eccentric contraction. These are the differences between the two words that are associated with body building and weight lifting, namely, eccentric and concentric.
IGBT vs Thyristor Thyristor and IGBT (Insulated Gate Bipolar Transistor) are two types of semiconductor devices with three terminals and both of them are used to control currents. Both devices have a controlling terminal called ‘gate’, but have different principals of operation. Thyristor Thyristor is made of four alternating semiconductor layers (in the form of P-N-P-N), therefore, consists of three PN junctions. In analysis, this is considered as a tightly coupled pair of transistors (one PNP and other in NPN configuration). The outermost P and N type semiconductor layers are called anode and cathode respectively. Electrode connected to inner P type semiconductor layer is known as the ‘gate’. In operation, thyristor acts conducting when a pulse is provided to the gate. It has three modes of operation known as ‘reverse blocking mode’, ‘forward blocking mode’ and ‘forward conducting mode’. Once the gate is triggered with the pulse, thyristor goes to.......READ