Norton resistance is found by?
a) Shorting all voltage sources
b) Opening all current sources
c) Shorting all voltage sources and opening all current sources
d) Opening all voltage sources and shorting all current sources

Explanation

Given , `A = 10 cm^2 = (10^-3)(m^2), m = 1kg `
` p=100kPa = (10^5)Pa, l=20 cm`
` Case 1: External pressure exists `
` Case 2 : Internal pressure does not exists `
` (P_1)(V_1) = (P_2)(V_2)`
` ((10^5) + 1 xx 9.8 / (10^-3)) V = (1 xx 9.8/(10^-3)) xx V_1)`
` rArr ((10^5) + 9.8 xx (10^3)) A xx l`
` = 9.8 xx (10^3) xx A xx l' `
` rArr ((10^5) xx 2 xx (10^-1)+ 2 xx 9.8 xx (10^2))`
` = 9.8 xx (10^3)l' `
` rArr l'= (2 xx (10^4) + 19.6 xx (10^2)/ 9.8 xx (10^3))`
= 2.24081 m .