MHT CET2019Evening ShiftPhysicsCurrent ElectricityActual
The range of an ammeter of resistance ‘G’ can be increased from ‘I’ to ‘nI’ by connecting
Options
- AA series resistance of G n + 1 Ω
- BA shunt of G n - 1 Ω
- CA shunt of G n + 1 Ω
- DA series resistance of G n - 1 Ω
Correct answer
B. A shunt of G n - 1 Ω
Step-by-step solution
The range of an ammeter can be increased by connecting a shunt or parallel resistance to it, whose value is given by R = l g l - l g G Ω To increase the range from l to n l , the current passing through it is l = n l g Using this value in Eq. (i), we get R = l g n l g - l g G = G n - 1 Ω