Download ABVMU MBBS 2nd Year Pathology Paper I 2022 November Question Paper

1. 1. Define Ohm’s law.
   2. Define power and energy.
   3. State Kirchhoff’s current law.
   4. What are the advantages of three phase system?
   5. Define magnetic flux and flux density.

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   6. Define self and mutual inductance.
   7. Define impedance and admittance.
   8. Define power factor.
   9. What are the losses in a transformer?
   10. What is the function of commutator in DC machine?

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PART – B (5 x 10 = 50 Marks)

Answer all the questions choosing either A or B

2. A) A 100Ω resistor is connected in series with a parallel combination of two resistors of 200Ω and 300Ω respectively. If the source voltage is 200V, determine the current in each branch.

   (OR)

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   B) Find the current through 6 Ω resistor using Nodal analysis for the given circuit.

3. A) Explain the measurement of three-phase power using two wattmeter method.

   (OR)

   B) A three-phase, 400V supply is given to a balanced star connected load of resistance 20Ω and reactance 15Ω in each phase. Determine line current, power factor, power consumed.

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4. A) Derive the relationship between self-inductance, mutual inductance and coefficient of coupling.

   (OR)

   B) Determine the total inductance of the three coils connected in series. The self-inductances are L₁ = 0.05H, L₂ = 0.08H and L₃ = 0.1H. The mutual inductance between L₁ and L₂ is 0.025H, between L₂ and L₃ is 0.03H, and between L₃ and L₁ is 0.02H. Consider all the mutual inductances are aiding.

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5. A) Define the following terms with respect to AC circuits:

   1. Form factor
   2. Peak factor
   3. Average value
   4. RMS value

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   (OR)

   B) A series RLC circuit with R = 10Ω, L = 0.05H and C = 40µF is connected to a 230V variable frequency supply. Find:

   1. Resonant frequency
   2. Current at resonance
   3. Voltage across inductor at resonance

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   4. Q-factor

6. A) Explain the construction and working principle of a single-phase transformer.

   (OR)

   B) Explain the construction and working principle of a DC generator.

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