State at least three points of difference between the following terms/quantities :
a)Resistance and Resistivity
b) write merits and demeris of series combination of resistors .
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(a) Resistance is defined as the property of the conductor which opposes the flow of electric current. Resistivity is defined as the resistance offered by the material per unit length for unit cross-section. ... The SI unit of resistivity is Ohm.
(b)Advantages and disadvantages of series connection of resistors:
To control the current in a circuit, series connection is useful. ...
Damage of electrical appliance and short circuit can be prevented by connecting the fuse in series with the mains as well as the electrical appliance.
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