Question

the figure shows a network of resistances in which the point a is earthed
a) which point has the least potential
b) potential across 4 ohm resistorand direction
c) potential across 3 ohm resistor and direction​

Answer 1

Explanation:

Write the following in logarithmic form.

(i) 35

= 243 (ii) 210 = 1024 (iii) 106

= 1000000

Answer 2

answers for following questions

Explanation:

Given:

Va =0V

Solution

Vab = 2V

Va - Vb = 2V

0-Vb = 2V

Vb = -2V

Therefore, potential at B is -2V

Now, Vdb = 8V

Vd-Vb = 8V

Vd - (-2V) = 8V

Vd = 6V

Therefore, potential at point D is 6V

Now, Vdc = 4V

Vd-Vc =4V

6-Vc = 4V

Vc = 2V

Therefore, potential at C is 2V

Va=0V, Vb =-2V, Vc = 2V, Vd = 6V

a) point B has lowest potential equal to -2V

b) potential across 4ohm resistor is Vc-Vb = 2-(-2) = 4V

Since Vc > Vb, hence direction is from B to C

c) potential across 3ohm resistor is Vd-Va = 6-0 = 6V

Since Vd > Va, hence direction is from D to A