A milliammeter of range 10 mA has a coil of resistance 1 Ω. To use it as a voltmeter of range 10 V, the resistance that must be connected in series with it is
A. 999 Ω
B. 1000 Ω
C. 9 Ω
D. 99 Ω
Answer:A
A milliammeter of range 10 mA has a coil of resistance 1 Ω. To use it as a voltmeter of range 10 V, the resistance that must be connected in series with it is
A. 999 Ω B. 1000 Ω C. 9 Ω D. 99 Ω