Physics

Their connection with each other is established as a result of Faraday's law of induction. This law states that a change in the magnetic field can produce electricity. This is due to the production of an electromotive force from the loop which results in the generation of electricity.

Please find the answer the below

Please find the answer below

Because E points along the tangent to the lines of force. If initial velocity is zero then due to the force, it always moves in the direction of E. Hence will always move on some lines of force

In Case I when both are positively charged, due to induction positive charge moves outwards on spheres, increasing effective distance between centres of charge causing magnitude of the force to decrease.

$n\propto \frac{1}{l}$

Now $l=l_1+l_2+l_3$

$\Rightarrow \frac{l}{n}=\frac{1}{n_1}+\frac{1}{n_2}+\frac{1}{n_3}$

$A_1=\sqrt[]{{\left(5\right)}^2+{\left(5\sqrt[]{3}\right)}^2}=10$

$A_2=5$

Then, $\frac{A_1}{A_2}=\frac{10}{5}=\frac{2}{1}$

Yes, a material's resistivity will increase with the presence of impurities. This is because these impurities will occupy more surface area and disrupt the flow of electrons which will impact their free movement. As a result, the current cannot pass freely through the material and it will affect the resistivity.

Resistance is referred to the ability of an object to oppose the flow of electric current through itself. On the other hand, resistivity is the property of that particular material of resisting the passage of electric current over a particular unit area. Resistance has SI unit ohm whereas resistivity has ohm-metre.