Moving Charges and Magnetism - Result Question 81

«««< HEAD:content/english/neet-pyq-chapterwise/physics/moving-charges-and-magnetism/moving-charges-and-magnetism-result-question-81.md

83. The resistance of an ammeter is $13 \Omega$ 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

======= ####83. The resistance of an ammeter is $13 \Omega$ 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

3e0f7ab6f6a50373c3f2dbda6ca2533482a77bed:content/english/neet-pyq-chapterwise/physics/moving-charges-and-magnetism/moving-charges-and-magnetism—result-question-81.md (a) $2 \Omega$

(b) $0.2 \Omega$

(c) $2 k \Omega$

(d) $20 \Omega$

[2007]

Show Answer

Answer:

Correct Answer: 83. (a)

Solution:

  1. (a) We know

$ \begin{aligned} & \frac{I}{I_S}=1+\frac{G}{S} \\ & \frac{750}{100}=1+\frac{13}{S} \\ & S \Rightarrow 2 \Omega \end{aligned} $