Question

pls solve it pls and no unnecessary answers​

Answer 1

Answer:

i) Resistivity is a measure of the resisting power of a specified material to the flow of an electric current.

Or, Resistivity is the electrical resistance of a conductor of unit cross-sectional area and unit length.

ii) We know,

Power = Voltage X Electric current = V I

or, Power = V x $\frac{V}{R}$ = $\frac{V^{2} }{R}$

or, R = $\frac{V^{2} }{P}$ = $\frac{240 X 240 }{600}$ = 96 Ohm

For finding current we have

V = I R

or, I = $\frac{V}{R}$ = $\frac{240}{96}$ = 2.5 A