if a current of 12mA exists in the `5k(Omega)` resistor, find the currents in the other three resistors.what is the potential difference between the points A and B?

Explanation

`i_1 xx 20 = i_2 xx 10 `
` rArr i_1/i_2 = 10/20 = 1/2 `
` i_1 = 4 mA, i_2 = 8mA `
` Current in 20K Omega register = 4mA`
` Current in 10K Omega register = 8 mA `
` Current in 100K Omega register = 12mA `
`V= V_1 + V_2 + V_3 `
` = 5K Omega xx 12 mA + 10 K Omega `
` xx 8 mA + 100 K Omega xx 12 mA `
` = 60 + 80 + 1200 volts . `
= 1340 volts.