Un alambre de 1000m de longitud y resistividad 5x10−6Ωm esta conectado a un voltaje de 100v. ¿Cual debe ser el area de su seccion transversal si queremos que circule una corriente de 2A por el alambre

A = 1 cm²

Explanation:

The question is "A wire 1000m long and resistivity 5x10−6Ωm is connected to a voltage of 100v. What must be the area of ​​its cross section if we want a current of 2A to flow through the wire? "

Length of a wire, l = 1000 m

Resistivity of wire,

Voltage, V = 100 V

Current flowing in the wire, I = 2A

We need to find the area of cross section of of the wire. Resistance of a wire is given by the formula :

....(1)

A is area of cross section

Also, ....(2)

From (1) and (2) :

So, the area of cross-section of the wire is 1 cm².

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards

amplitude

hope this