An ammeter having internal resistance of $0.81 \Omega$ can read upto 1. To convert it into an ammeter reading 0 - 10 A we have to connect:

a $90 \Omega$ resistor in series a $9.0 \Omega$ resistor in parallel a $0.09 \Omega$ resistor in parallel a $0.9 \Omega$ resistor in parallel

a $0.09 \Omega$ resistor in parallel

The correct answer is Option (3) → a $0.09 \Omega$ resistor in parallel