Electric current, Electrical Engineering

 

Electric current

 

  • Electric current is a flow of electrons. Each electron carries a very small amount of negative charge (1.6 x 10-19 coulombs)

 

  • A current of 1 amp at a point in a circuit is the flow of 1 coulomb of charge per second flowing past that point. This means that approx 6 x 1018 electrons must pass the point every second. This is a huge number.

 

  • Electrons circulate continuously round a circuit being pumped round by a power source.

 

  • If more than one route round the circuit is available then the electron flow will divide (in some ratio) between the available routes.

 

  • Electrons will not be lost - all those that emerge from the power source will eventually return to it.

 

  • To pump the current through any resistors in the circuit requires a voltage to be developed across them (think of it as a pressure difference required to push a fluid through a restriction)

 

Posted Date: 8/20/2012 11:42:01 PM | Location : United States







Related Discussions:- Electric current, Assignment Help, Ask Question on Electric current, Get Answer, Expert's Help, Electric current Discussions

Write discussion on Electric current
Your posts are moderated
Related Questions

Q. Some element voltages and currents are given in the network con?guration of Figure. Determine the remaining voltages and currents. Also calculate the power delivered to each ele

What is meant by polling? In polling schemes, a set of address lines is driven by the controller to address every of the masters in sequence. When a bus request is received fro

Describe soldering materials and their uses. The process of joining two or more metals is termed as soldering. An alloy of two or more metals of low melting point utilized for

File Flops The flip flop is a one storage biteable   device. The basic  bistable device stores a binary  of inputs  value. the flip flops  are categorized according  to the nu

Q. The twin-tee or notch network shown in Figure is often used to obtain band-reject characteristics. (a) Determine the transfer function V 2 /I 1 . (b) Find the angular freq

Explain the Working of Asynchronous (Ripple) Counters? An external clock is connected to the clock input of the first flip-flop (FF0) only. Thus FF0 changes state at the falli

Give some applications of constantan. Constantan is an alloy of nickel and copper. It is used in thermocouples, motor starters and precision resistors.

Compute the Fourier Transform of the following function: f(x) = exp( - x 2 /(2σ 2 )) cos (2πx/k) where σ and k are constants. What is the minimum sampling rate required

A signal stands for 0110 with positive logic in which low stands for 0 and high stands for 1. If negative logic (in which low stands for 1 and high stands for 0) is used, what digi