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NEET2022PhysicsCurrent ElectricityActual

The sliding contact C is at one fourth of the length of the potential wire (A B) from A as shown in the circuit diagram. If the resistance of the wire A B is R₀ , then the potential drop (V) across the resistor R is:

Options

  1. A4 ~V ₀ R 3 R ₀+16 R
  2. B4 V₀ R 3 R₀+R
  3. C2 V₀ R 4 R₀+R
  4. D2 V₀ R 2 R₀+3 R

Correct answer

A. 4 ~V ₀ R 3 R ₀+16 R

Step-by-step solution

The given diagram can be redrawn as follow: The potential across A C , V _ AC = R _ AC R _ BC + R _ AC V ₀ aligned & R R₀ 4 R+R₀ 3 R₀ 4 + R R₀ 4 R+R₀ V₀ & = 4 R V₀ 3 R₀+16 R aligned

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