A Diode, or a Bridge Rectifier is a electrical component that blocks electron flow in one direction, but allows it to flow in the other direction.
Usually made out of a Semiconductor called Silicon, A diode has an infinite amount of applications, but the most common is a Full Wave Bridge Rectifier. this device converts Alternating Current into Direct Current with 100% efficiency (except for the 1.4 volt drop between Diodes).
no we not use resistance in place of diode.
The main use of transistors in electronic circuits is as switches and memory storage
there are many uses. one major use i remember is in rectification i.e convert ac to dc For switch operation
Bipolar Transistors and Diode's .
you use an ohm meter
To prevent excess voltage to enter in a diode or LED etc
Electronic devices use all sorts of complicated electronic circuits - amplifier circuits for example, and switching circuits. The details, however, are a bit complicated for a short answer.
You use a diode in a circuit to make sure that if the power was reversed it would not destroy the components, it can also be used to emit light. Its main use is that it is that positive energy can only enter from one side.
We need to use electric circuits so as to make the transfer of electricity easier. you must have seen various paths made in the circuits, these path controls and regulates the flow of current . But if we don't use electronic circuits then we will have to use wires which is very difficult to handle when we have to do large no. of operations li in computer.
Actually it can be used as a diode, but rarely is. Just connect the grid and plate together and it has been reduced to a diode. There are also certain circuits that use the cathode and grid as a diode, while also obtaining an amplified output on the plate.
Mainly that electronic components include items that DON'T have a straight-line characteristic. That is, if you plot current versus voltage, you won't get a straight line. That makes it possible to use them for "active" circuits; a very simple example is the rectifier diode, which allows current to pass in one direction, but not in the opposite direction.
bridge is use in 4 diode fullwave rectification to allow complete cycle so that there will an output DC for both the positive and ndgative half-cycle of the input AC.