MHT CET20239 May 2023Morning ShiftPhysicsExperimental PhysicsActual
In a meter bridge experiment null point is obtained at l ~cm from the left end. If the meter bridge wire is replaced by a wire of same material but twice the area of across-section, then the null point is obtained at a distance
Options
- A2 l ~cm from left end.
- Bl ~cm from left end.
- Cl / 2 ~cm from left end.
- Dl / 4 ~cm from left end.
Correct answer
B. l ~cm from left end.
Step-by-step solution
At null condition, R ₁ R ₂ = X 100- X This condition is independent of the crosssectional area of the wire used. The null point will remain the same. (i.e., l ~cm from left end)