Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • I need help with An ammeter reads upto 1 ampere. Its internal resistance is 0.81 ohm. To increase the range to 10 A the value of the required shunt is

An ammeter reads upto 1 ampere. Its internal resistance is 0.81 ohm. To increase the range to 10 A the value of the required shunt is

  • Option 1)

    0.03\Omega

  • Option 2)

    0.3\Omega

  • Option 3)

    0.9\Omega

  • Option 4)

    0.09\Omega

 

Answers (1)

As we learnt in

Moving coil galvanometer -

It is a very sensitive instrument used to measure the small current.Galvanometer gives the deflection which is proportional to electric current flowing through it.

-

 

\frac{S}{S+G}=\frac{I_{g}}{I}\Rightarrow S=\frac{I_{g}G}{I-I_{g}}

\therefore \; \; \; S=\frac{1\times 0.81}{10-1}=\frac{0.81}{9}=0.09\, \Omega \; in\; parallel.


Option 1)

0.03\Omega

Incorrect option

Option 2)

0.3\Omega

Incorrect option

Option 3)

0.9\Omega

Incorrect option

Option 4)

0.09\Omega

Correct option

Posted by

Vakul

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions

Trending Articles/News

anam-khan

JEE Main 2025 session 2 answer key out for BArch, BPlanning; response sheet on jeemain.nta.nic.in
anam-khan

JEE Mains 2025 Paper 2 Answer Key LIVE: BArch final answer key PDF expected soon at jeemain.nta.nic.in
anam-khan

JEE Main 2025 response sheet errors: Delhi HC allows student to apply for JEE Adv, seeks NTA explanation

Latest Question