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a galvanometer has a resistance of 20 Ω and reads full scale when 0.2V is applied across it .to convert it into a 10 A ammeter ,the galvanometer coil should have a 1)0.05Ω resistor connected across it 2)100Ω resistor connected across it 3)0.02Ω resistor connected across it 4)200Ω resistor connected in series with it

a galvanometer has a resistance of 20 Ω and reads full scale when 0.2V is applied across it .to convert it into a 10 A ammeter ,the galvanometer coil should have a
1)0.05Ω resistor connected across it
2)100Ω resistor connected across it
3)0.02Ω resistor connected across it
 4)200Ω resistor connected in series with it

Grade:12

1 Answers

Suraj Singh
148 Points
7 years ago
The correct answer is 3rd one... As to convert a galvanometer into an ammeter we provide a resistance in parallel with the galvanometer known as shunt... Apply basic ohms law and get d ans

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