Extra electronics and electrical question with answer

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some important question for electrical and electronics;
1]what is switch and explain its types.
Make and break circuit is called switch.
There are following typs of switch:
a)Toggle switch
b)push botton switch
c)Emergency switch
d)Read switch
2]What is relay and its type?
Relay is electromechanical switch.it consist two circuit first is called coil circuit and second is called load circuit.
There are three types of relay;
a]solid state relay(used in electronics).
b]Glass relay
c]Thermal relay
3]What is electrical panel?
Systemetic arrangement of electrical equipment is called electrical panel.​
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