The value of voltage Vab in the figure shown below is:

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SSC JE Electrical 11 Oct 2023 Shift 3 Official Paper-I
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  1. 0 V
  2. -40 V
  3. 40 V
  4. -190 V

Answer (Detailed Solution Below)

Option 2 : -40 V
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Detailed Solution

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Concept

Kirchoff's Current Law (KCL):

According to the KCL: at any node, the sum of all incoming currents is always equal to the sum of all outgoing currents.

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\(I_1+I_4=I_2+I_3+I_5\)

Calculation

Applying KCL at node b, we get:

-11 + I + 7 = 0

I = 4 A

Vba = 4 × 10 = 40 V

Vab = -Vba = -40 V

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