A galvanometer of 100 Ω resistance gives full scale deflection with 0.01 A current. How much resistance should be connected to convert it into an ammeter of range , 10 A :

Question

A galvanometer of 100 Ω resistance gives full scale deflection with 0.01 A current. How much resistance should be connected to convert it into an ammeter of range , 10 A : (A) 0.1 Ω in parallel (B) 0.1 Ω in series (C) 0.2 Ω in parallel (D) 0.2 Ω is series

Tardigrade Admin · Accepted Answer

Here: resistance of galvanometer G=100 Ω Maximum current across galvanometer Ig=0.01A Current range in ammeter = 10 A Since, the shunt resistance should be connected in parallel to convert the galvanometer into an ammeter. S=( (Ig/I-Ig) )G=[ (0.01/(10-0.01)) ]× 100 =0.1 Ω

Q. A galvanometer of 100 $Ω$ resistance gives full scale deflection with 0.01 A current. How much resistance should be connected to convert it into an ammeter of range , 10 A :

0.1 $Ω$ in parallel

0.1 $Ω$ in series

0.2 $Ω$ in parallel

0.2 $Ω$ is series

Q. A galvanometer of 100 Ω resistance gives full scale deflection with 0.01 A current. How much resistance should be connected to convert it into an ammeter of range , 10 A :

0.1 Ω in parallel

0.1 Ω in series

0.2 Ω in parallel

0.2 Ω is series

Here: resistance of galvanometer G=100Ω Maximum current across galvanometer Ig​=0.01A Current range in ammeter = 10 A Since, the shunt resistance should be connected in parallel to convert the galvanometer into an ammeter. S=(I−Ig​Ig​​)G=[(10−0.01)0.01​]×100 =0.1Ω

Q. A galvanometer of 100 $Ω$ resistance gives full scale deflection with 0.01 A current. How much resistance should be connected to convert it into an ammeter of range , 10 A :

0.1 $Ω$ in parallel

0.1 $Ω$ in series

0.2 $Ω$ in parallel

0.2 $Ω$ is series