Question

The length of cylindrical metal (copper) is 1 cm
and radius is 2.0 mm. If 120 V potential difference
applying across the ends of the rod than find out
the electric current flowing through it.
(Resistivity of copper is 1.7 x 10-22-m)​

Answer 1

ok so 1+2+3+4+5+5+6+6+6+6+6+I 5+I+I+I+I+I+

sorry I don't know

Answer 2

• v=120
• l=1
• r=2 ,
• $\pi {r}^{2} = a$
• 22÷7×2×2
• 88÷7=a
• 12.5=a

Explanation:

R=rho.l÷a

1.7×10-22÷12.5

0.136×10-22

i=vr

i=240