Dimensions of a block are 1,cm times 1,cm tim | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The resistance $R$ of a conductor is given by the formula $R = \rho \frac{l}{A}$, where $\rho$ is the resistivity (specific resistance), $l$ is th

Vedclass · Accepted Answer

$3 	imes 10^{-3}\, \Omega$

Vedclass · Answer

(B) The resistance $R$ of a conductor is given by the formula $R = ho \frac{l}{A}$, where $ho$ is the resistivity (specific resistance), $l$ is the length, and $A$ is the cross-sectional area.Given dimensions are $1\,cm 	imes 1\,cm 	imes 100\,cm$.For the resistance between the opposite square faces, the length $l$ is the distance between these faces, which is $100\,cm = 1\,m$.The cross-sectional area $A$ is the area of the square face, which is $1\,cm 	imes 1\,cm = 1\,cm^2 = 10^{-4}\,m^2$.The resistivity $ho = 3 	imes 10^{-7}\, \Omega \cdot m$.Substituting these values into the formula:$R = (3 	imes 10^{-7}\, \Omega \cdot m) 	imes \frac{1\,m}{10^{-4}\,m^2}$$R = 3 	imes 10^{-7} 	imes 10^4\, \Omega$$R = 3 	imes 10^{-3}\, \Omega$.

Dimensions of a block are $1\,cm \times 1\,cm \times 100\,cm$. If the specific resistance of its material is $3 \times 10^{-7}\, \Omega \cdot m$, then the resistance between the opposite rectangular faces (the square ends) is:

Similar Questions

The major product obtained on treatment of $CH_3CH_2CH(F)CH_3$ with $CH_3O^-/CH_3OH$ is

$A$ body of mass $m$ is moving in a circle of radius $r$ with a constant speed $v$. The force on the body is $\frac{mv^2}{r}$ and is directed towards the centre. What is the work done by this force in moving the body over half the circumference of the circle?

$A$ big water drop is formed by the combination of $n$ small water drops of equal radii. The ratio of the surface energy of $n$ drops to the surface energy of the big drop is

$\lim _{x \rightarrow 0} \frac{\sin \left(\pi \cos ^2 x\right)}{x^2}$ is equal to

The structure of $XeOF_4$ is

Vedclass Test Series

Exam Paper Generator

Online Exam Module