There are mainly two type of resistor available:
Fig (a): Fixed resistor.
Fig (b): Variable resistor.
Difference between fixed and variable resistor:
✓ Fixed resistor: This type of resistor value can't be varied once installed in the system.
✓ Variable resistor: Resistor value can be adjusted at anytime and any instant.
What is the Rheostat?
This is very useful to control the current of any circuit by varying the resistance.
To know more about resistor please visit the given link:
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