Transformer question (physics)?

Question

Can transformer be used to change direct current e.m.f? If not , why?

Answer 1

A transformer works from the expanding and collasp of a magnetic or inductive field. Without the expandin or contracting field, no lines of flux are cut.

What is possible instead is to use a chopper circuit and convert the DC to AC run it through a transformer and then rectify the AC back to a pulsating DC and then filter it back to pure DC.

Answer 2

The normal one with coils can't do DC, but in college we build one that used magneto-hydrodynamic energy that did DC to DC. A closed circuit pipe filled with mercury. A large magnet on one side, an electric current passed through the mercury. The mercury is thus pumped around the circuit. At another magnet, electrodes take current out of the moving conductor (the mercury). Its DC to DC. Only useful in a college lab to prove a point, but the physics works.

Answer 3

No. A transformer is impossible with out inductance. Inductance happens only once, is over quickly, and it is not continuous with DC. With AC inductance is continuous. Therefore the transformation is continuous with AC.

Answer 4

Any action picture that shows somebody getting thrown backwards by using utilising a bullet hitting them is defying the regulation of physics which ascertain with the "opposite and equivalent reaction" which states that the stress of a bullet flying could additionally be transmitted to the shooter. in distinctive words, it truly is impossible for the bullet hit to dramatically knock somebody over. indoors the actually international a bullet hit merely is going into the physique, it would not throw it in any understand. there are a number of video clips that have the actors putting from wires to look as though they are flipping devoid of situation into the air mutually as appearing kicks and suchlike. it is achieveable to end kicks and flips, regardless of if the action picture makes it look as though: a) it truly is hardship-free b) takes awhile for the guy to land C) a chain of kicks extra by using utilising somebody indoors the air are robbing the attacker of forward momentum.. the perception of a individual flying forwards and handing over many forward kicks in succession is neat to artwork out on exhibit exhibit, yet indoors the actually be huge wakeful those kicks may well be ineffective if even extremely achieveable. The matrix is a stable social gathering of those products, regardless of if it truly is argued that they weren't extremely attempting to imitate actually international physics on the time. video clips like undertaking Impossible2 & 3, Charlies Angels a million & 2, and Mortal Kombat a million, & 2 attempt this variety of element a lot.