Question

In the figure given below, the Thevenin’s equivalent pair, as seen at the terminals P-Q, is given by __________

(a) 2 V and 5 Ω

(b) 2 V and 7.5 Ω

(c) 4 V and 5 Ω

(d) 4 V and 7.5 Ω

The question was asked in quiz.

I'm obligated to ask this question of Thevenin Theorem Involving Dependent and Independent Sources in section Useful Theorems in Circuit Analysis of Network Theory

Answer 1

Right choice is (a) 2 V and 5 Ω

Easiest explanation: For finding VTH,

VTH = \(\frac{4 ×10}{10+10}\) = 2V

For finding RTH,

RTH = 10 || 10

= \(\frac{10×10}{10+10}\) = 5 Ω.