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NDA 2 2024 GAT, question 72

Topic: Physics

Q72

For an electric circuit given below, the correct combination of voltage (V)(V) and current (I)(I) is

Figure for Q72

  1. (a) V=900 V; I=18 AV=900\text{ V};\ I=18\text{ A}
  2. (b) V=300 V; I=5.5 AV=300\text{ V};\ I=5.5\text{ A}Correct answer
  3. (c) V=600 V; I=1 AV=600\text{ V};\ I=1\text{ A}
  4. (d) V=300 V; I=2 AV=300\text{ V};\ I=2\text{ A}

Solution.

Answer: (b) V=300 V; I=5.5 AV=300\text{ V};\ I=5.5\text{ A}

  1. The 100 Ω branch carries 3 A, so the parallel combination has voltage V=IR=300 V.
  2. The 200 Ω and 300 Ω branches carry 1.5 A and 1 A.
  3. Total current=3+1.5+1=5.5 A.