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Question: A milliammeter of range 10 mA has a coil of resistance 1 Ω. To use it as voltmeter of range 10 volt,...

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

A

999 Ω

B

99 Ω

C

1000 Ω

D

None of these

Answer

999 Ω

Explanation

Solution

By using R=Vig−G⇒R=1010×10−3−1=999ΩR = \frac { V } { i g } - G \Rightarrow R = \frac { 10 } { 10 \times 10 ^ { - 3 } } - 1 = 999 \Omega