Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Medical
  • A voltmeter with resistance   indicates a voltage of 125 V in t

A voltmeter with resistance \mathrm{R_V=2500 \Omega}  indicates a voltage of 125 V in the circuit shown in Figure. What is the series resistance (R) to be connected with voltmeter in this circuit so that it indicates 100V ?

Option: 1

625 Ω 


Option: 2

120 Ω 


Option: 3

550 Ω 


Option: 4

Data are insufficient


Answers (1)

best_answer

\mathrm{R_0=2500 \Omega \\ }

\mathrm{E=125 \mathrm{~V} }

When r I connected in series
\mathrm{ i=\frac{E}{R_0+r} }

Reading in voltmeter \mathrm{ =E-i r=100 }

\mathrm{ \therefore 100=125-\frac{125}{2500+r} \times r \\ }

\mathrm{ \Rightarrow \quad r=625 \Omega }.
 

Posted by

admin

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

Karnataka: NEET candidate dies by suicide; no note recovered
anam-khan

CBSE Re-evaluation Row: Dharmendra Pradhan seeks detailed report on technical failures
anam-khan

Before NEET, CMC Vellore’s unique MBBS admissions tested aptitude along with merit; paper-leak restarts debate

Latest Question