1.

A copper wire has a square cross-section, 2.0 mm on a side.  It carries a current of 8 A and the density of free electrons is \[8\times {{10}^{28}}\,{{m}^{-3}}\]. The drift speed of electrons is equal to [AMU (Med.) 2002]

A.            0.156 × \[{{10}^{-3}}\] m.s?1  
B.            0.156 × \[{{10}^{-2}}\] m.s?1
C.            3.12 × \[{{10}^{-3}}\] m.s?1    
D.            3.12 × \[{{10}^{-2}}\] m.s?1
Answer» B.            0.156 × \[{{10}^{-2}}\] m.s?1


Discussion

No Comment Found

Related MCQs