Moving Charges and Magnetism - Result Question 81

83. The resistance of an ammeter is 13Ω and its scale is graduated for a current upto 100 amps. After an additional shunt has been connected to this ammeter it becomes possible to measure currents upto 750 amperes by this meter. The value of shunt-resistance is

(a) 2Ω

(b) 0.2Ω

(c) 2kΩ

(d) 20Ω

[2007]

Show Answer

Answer:

Correct Answer: 83. (a)

Solution:

  1. (a) We know

IIS=1+GS750100=1+13SS⇒2Ω

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