Question

A milliammeter of range 10 mA has a coil of resistance $1\Omega$. To use it as voltmeter of range 10 volt, the resistance that must be connected in series with it will be

• A. $999\Omega$
• B. $99\Omega$
• C. $1000\Omega$
• D. $100\Omega$

Answer 1

The correct option is A $999\Omega$

By using $R=\frac{V}{i_g}-G\Rightarrow R=\frac{10}{10\times {10}^{-3}}-1=999\Omega$