Task $1($Max points: $1)$

A DC circuit schematic is given. Determine the reading of the ideal ohmmeter when the ideal key

$S$ is closed, if $R_1=6$Ohm,$R_2=2$Ohm,$R_3=3$Ohm,$R_4=2$Ohm.

Supplementary materiat:

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task

A$)6$ Ohm

B$)3$ Ohm

C$)2$ Ohm

D$)13$ Ohm

E$)2,31$ OhmGiven a hollow ball made of an isotropic elastic material, the inner and outer surfaces of which are concentric

spheres of radius a and $b,$ respectively. Pressure $p_a$ acts in the cavity of the sphere, and pressure $p_b=0$ is

applied to the outer surface of the sphere. Find the stress state of the ball if $ab.$