Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Medical
  • A coil carrying constant current is connected to a ba

A 10 \Omega, 20\, \mathrm{mH} coil carrying constant current is connected to a battery of 20 \mathrm{~V} through a switch. Now after switch is opened current becomes zero in 100 \mu \mathrm{s}. The average e.m.f. induced in the coil is____________ \mathrm{V}.

Option: 1

400


Option: 2

-


Option: 3

-


Option: 4

-


Answers (1)

best_answer

\mathrm{R= 10\, \Omega }
\mathrm{L= 20 \times 10^{-3}H}

Current in the steady state ,
\mathrm{I_{0}= \frac{v}{R}= 2A}

\mathrm{Avg.Emf\: induced= e_{avg}= L\left |\frac{\Delta I}{\Delta t} \right |}
                                                      \mathrm{= 200\times10^{-3}\left | \frac{2}{100\times 10^{-6}}\right |}
\mathrm{\Rightarrow e_{avg}= 400}    

Posted by

Rishabh

View full answer

NEET 2024 Most scoring concepts

    Just Study 32% of the NEET syllabus and Score up to 100% marks

Similar Questions

Trending Articles/News

anam-khan

NEET UG 2026 Registration LIVE: NTA to begin NEET form soon at neet.nta.nic.in; exam date, fees updates
anam-khan

NEET UG 2026 LIVE: NTA NEET registration soon at neet.nta.nic.in; exam date, how to apply, latest updates
anam-khan

50 MBBS students from Vaishno Devi medical college reallocated to govt colleges after NMC action

Latest Question