MHT CET20244 May 2024Evening ShiftPhysicsCurrent ElectricityActual
When a galvanometer is shunted by a resistance. 's', its current capacity increases ' n ' times. If the same galvanometer is shunted by another resistance ' s ₁ ', its capacity will increase to ' n ₁ ' times original current. The value of ' n₁ ' is
Options
- A( n + s ) s ₁
- Bs ₁( n - s )- s ₁ ~s ₁
- C( n +1) s s ₁
- Ds ( n -1)+ s ₁ ~s ₁
Correct answer
D. s ( n -1)+ s ₁ ~s ₁
Step-by-step solution
For galvanometer shunt resistance is given by, s=G ( 1 1-I / I_g ) Current capacity is given by, n = I / Ig aligned & s = G ( 1 1- n ) & G = s ( n -1)...(i) aligned When same galvanometer is shunted with resistance ' s ₁ ' aligned & s ₁= G ( 1 1- n ₁ ) & n ₁= G + s ₁ ~s ₁ = s ( n -1)+ s ₁ ~s ₁ aligned