Question

-1) A wire of uniform cross-sectional area has a length of 10m, a resistance of 20 and
resisitivity 2x10 cm. The cross-sectional area in m? is;
b)
1x10-5
C 0 5x10-5
1x10
a) 2x104
d)1×10-4​

Answer 1

$\underline { \mathbb{CORRECT ~QUESTION}}$

A wire of uniform cross sectional area has length equal to 10 m, a resistance of 20 Ω and resistivity of 2×10 Ω m. Find cross sectional area in meters.

$\underline{ \mathbb{ANSWER}}$

$\sf{ \underbrace{Given}}:-$

Resistance (R) = 20 Ω

Resistivity (ρ) = 2×10 Ωm

Length (l) = 10 m

$\underbrace{ \sf{To \: find}}:-$

Area of cross section (A)

$\sf{ \underbrace{Solution}}:-$

$\star \: \boxed {\rm{A = \dfrac{ \rho \times l}{R} }}$

$⇢ \sf A= \dfrac{2 \times 10 \times 10}{20}$

$\therefore \: \underline{\underline{ \sf{ A=10 \: m}}}$

Answer 2

Answer:

this is the answer of this question