HOW CAN I APPLY THE NORTON'S THEOREM IN FINDING THE VOLTAGE ACROSS R3 WITH THE FIGURE GIVEN IN THE "Nodal Analysis Circuit".

http://www.allaboutcircuits.com/vol_1/chpt_10/4.html

Find the voltage across R3 using Norton’s Theorem.

 

build it on a breadboard and test obviosly

 

HOW CAN I APPLY THE NORTON'S THEOREM IN FINDING THE VOLTAGE ACROSS R3 WITH THE FIGURE GIVEN IN THE "Nodal Analysis Circuit".

http://www.allaboutcircuits.com/vol_1/chpt_10/4.html

Find the voltage across R3 using Norton’s Theorem.

That wouldn't be particularly useful or informative.

Given the Nodal Analysis solution already leads to the values of E1 & E2 where
E1 = 3.809
E2 = -1.5476

it is readily implied that the voltage across R3 would be E1-E2

or VR3=E1-E2=3.809-(-1.5476)=5.3566