Question

Find the potential difference of A and B ​

Answer 1

Answer:

As per the question, we have to find out the potential difference between points A and B.

So, first find out the net resistance of the circuit

Therefore R eq. = 4+4+12 =20 ohms.

Therefore net current in the circuit

I = V/(R eq.)

=> I = (6-4)/20

=> I = 2/20 = 0.1 amperes

Now you have to apply Kirchoff current law. In simple words, start from a point , note the potential drops and end at another point.

Let potential at point A be VA,

and at point B be VB.

Now I will start from A and end at B and note the potential differences along the way.

VA + I*4 + 4 = VB

=> VA - VB = -4 - (0.1*4)

=> ∆V = - 4.4 volts

The answer is -4.4 volts.