Question

Define switch and rehostat and resitvity

Answer 1

Answer:

1. Rehostat :- It is a variable resistor which is used to control current in a system .
2. Switch :- It is device which is used to complete or break the circuit at any time .
3. Resistivity :- The resistivity of a material is the resistance of a wire of that material of unit length and unit cross-sectional area