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MHT CET202014 Oct 2020Morning ShiftPhysicsCurrent ElectricityActual

In potentiometer experiment, cells of e.m.f. E and E 2 are connected in series (E ₁> E ₂ ), the balancing length is 64 ~cm of the wire. If the polarity of E ₂ is reversed, the balancing length becomes 32 ~cm . The ratio E ₁ E ₂ is

Options

  1. A1: 2
  2. B2: 1
  3. C1: 3
  4. D3: 1

Correct answer

D. 3: 1

Step-by-step solution

aligned E ₁ E ₂ &= ₁+ ₂ ₁- ₂ &= 490+90 490-90 = 580 400 =1.45 aligned

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