Question 276: Current Electricity

Question

In a conductor, if the number of conduction
electrons per unit volume is 8.5 × 1028 m–3 and
mean free time is 25ƒs (femto second), it's
approximate resistivity is :-
(me = 9.1 × 10–31 kg)

Accepted Answer

$$ho  = {{2m} \over {n{e^2}	au }}$$
= 3.34 ÃÂ 10
Ã¢ÂÂ8
$$\Omega $$ m

Answer

10–8 $$\Omega $$m

Answer

10–7 $$\Omega $$m

Answer

10–5 $$\Omega $$m

Answer

10–6 $$\Omega $$m

Current Electricity

In a conductor, if the number of conduction electrons per unit volume is 8.5 × 1028 m–3 and mean free time is 25ƒs (femto second), it's approximate resistivity is :- (me = 9.1 × 10–31 kg)

Choose the correct answer: