Question

In a wire of radius 0.5 mm an electric current of 0.5 ampere is flowing if in the wire no. Of free elections is 4.2×10 to the power 28 per m square 3 than calculate the draft velocity.

Answer 1

Answer:$I=nAevd$

vd=I/nAe

A=πr²   r=0.5mm=0.5×10power3 ⇒3.14×0.25×10power6

I=0.5 amp

n=4.2×10power28

e=1.6×10power-19 C

⇒vd=0.5÷(4.2×10power28×1.6×10power-19 ×0.25×10power6)

⇒0.5÷(1.68×10power13)

0.2976×10power-13

2.976×10power-12

Explanation:

Answer 2

Answer:

please solve this question step by step