MHT CET20227 Aug 2022Morning ShiftPhysicsCurrent ElectricityActual
The length of a potentiometer wire is L . A cell of e.m.f. E is balanced at a length L 3 from the positive end of the wire. If the length of the wire is increased L 2 at what distance will the same cell gives a balance point?
Options
- A2 L 3
- BL 2
- CL 6
- D4 L 3
Correct answer
B. L 2
Step-by-step solution
Let x be the required balance length. Potential gradient in the first case = E₀ L From equation (1) and (2), we get aligned & E₀ 3 = ( 2 E₀ 3 L ) x & x= L 2 aligned