Question

The resistance of 1 A ammeter is 0.018 Ω. To convert it into 10 A ammeter, the shunt resistance required will be

• A. 0.18 Ω
• B. 0.0018 Ω
• C. 0.002 Ω
• D. 0.12 Ω

Answer 1

Answer: (C)

0.002 Ω

Answer 2

By using $\frac { i } { i _ { g } } = 1 + \frac { 4 } { S }$ ⇒ $\frac { 10 } { 1 } = 1 + \frac { 0.018 } { S }$ ⇒ S = 0.002 Ω