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MHT CET202410 May 2024Morning ShiftPhysicsCurrent ElectricityActual

In potentiometer experiment, cells of e.m.f. E₁ and E₂ are connected in series (E₁ E₂ ) the balancing length is 80 cm of the wire. If the polarity of E ₂ is reversed, the balancing length becomes 20 cm. The ratio, E ₁ / E ₂ is

Options

  1. A1: 2
  2. B2: 3
  3. C3: 4
  4. D5: 3

Correct answer

D. 5: 3

Step-by-step solution

For potentiometer, aligned & E ₁ E ₂ = l₁+l₂ l₁-l₂ & E ₁ E ₂ = 80+20 80-20 = 100 60 = 5 3 =5: 3 aligned

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