Can a load be a resistor?

Can a load be a resistor?

Devices called resistors are built to provide precise amounts of resistance in electric circuits. Any device that performs some useful task with electric power is generally known as a load. Sometimes resistor symbols are used in schematic diagrams to designate a non-specific load, rather than an actual resistor.

What is load resistor for?

Load resistor is an output testing device or component which is used as ideal output while designing or testing the electrical circuit. The load is any device that can dissipate a considerable amount of power from the source to give the required output.

What function does a resistor perform?

Resistor definition and symbol A resistor is a passive electrical component with the primary function to limit the flow of electric current.

What does a resistor do in a relay?

In a relay, the resistor absorbs access voltage given off when the relay is activated. This will protect any other components in the circuit from voltage spikes. Relays allow for a high current flow circuit to be controlled by a low current flow circuit, and they are made to fit a variety of applications.

Do you need a resistor with a relay?

1 Answer. You only need a resistor in series with your relay coil if your are applying a voltage that is different than what your relay coil is rated for. At the rated voltage, the coil resistance will be sufficient to limit the current to the levels necessary to energize the coil.

Why put a diode across a relay coil?

A flyback diode or freewheeling diode is placed with reverse polarity from the power supply and in parallel to the relay’s inductance coil. The use of a diode in a relay circuit prevents huge voltage spikes from arising when the power supply is disconnected.

What are 5 pin relays used for?

5 pin relays provide 2 pins (85 & 86) to control the coil and 3 pins (30, 87 & 87A) which switch power between two circuits. They have both normally open and normally closed connection pins. When the coil is activated, power will be switched from the normally closed pin to the normally open pin.