AP EAMCET201724 Apr 2017Morning ShiftPhysicsCurrent ElectricityActual
In a potentiometer experiment, when a cell in the secondary circuit is shunted by a resistance ' R ', balancing length is ' L₁ '. On doubling the shunt resistance, balancing length increases to ' L₂ '. Internal resistance of the cell is
Options
- A2 R ( L ₂- L ₁ ) L ₁-2 ~L ₂
- B2 R ( L ₂- L ₁ ) (2 ~L ₁- L ₂ )
- CR ( L ₂- L ₁ ) L ₁-2 ~L ₂
- DR ( L ₂- L ₁ ) (2 ~L ₁- L ₂ )
Correct answer
B. 2 R ( L ₂- L ₁ ) (2 ~L ₁- L ₂ )
Step-by-step solution
No solution. Refer to answer key.