Question 346: Current Electricity

Question

A current of 5 A passes through a copper
conductor (resistivity = 1.7 × 10
–8
$$\Omega $$m) of radius
of cross-section 5 mm. Find the mobility of the
charges if their drift velocity is 1.1 × 10
–3
m/s.

Accepted Answer

$$\mu  = {{{V_d}} \over E}\,\,\,\,\,\,E = ho J$$
$$ = {{1.1 	imes {{10}^{ - 3}}} \over {1.7 	imes {{10}^{ - 8}} 	imes {5 \over {\pi  	imes 25 	imes {0^{ - 6}}}}}}$$
$$ = {{1.1 	imes {{10}^{ - 3}} 	imes \pi  	imes 25 	imes {0^{ - 6}}} \over {1.7 	imes {{10}^{ - 8}} 	imes 5}} \approx 1.01\,{m^2}/Vs$$

Answer

1.3 m
2
/Vs

Answer

1.0 m
2
/Vs

Answer

1.8 m
2
/Vs

Answer

1.5 m
2
/Vs

Current Electricity

A current of 5 A passes through a copper conductor (resistivity = 1.7 × 10 –8 $\Omega $m) of radius of cross-section 5 mm. Find the mobility of the charges if their drift velocity is 1.1 × 10 –3 m/s.

Choose the correct answer: