Question

When 1A current is passed through a galvanometer it shows full scale deflection. If the resistance of the coil of galvanometer is 99 W, then the resistor to be used to convert it into an ammeter of range 0-100 A is –

• A. 99 W in series
• B. 99 W in parallel
• C. 1 W in series
• D. 1 W in parallel

Answer 1

Answer: (D)

1 W in parallel

Answer 2

S = ̃ S = $\frac { 1 \times 99 } { 100 - 1 }$ = 1W