Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Medical
  • Two cells A and B of electromotive forces 1.3 V and 1.5 V, respectively, are arranged as shown in Figure, the voltmeter (assumed ideal) reads 1.45 V, the internal resistances of cells and

Two cells A and B of electromotive forces 1.3 V and 1.5 V, respectively, are arranged as shown in Figure, the voltmeter (assumed ideal) reads 1.45 V, the internal resistances of cells and are \mathrm{r_A ~ and~ r_B} , respectively. Which of the following is correct?

Option: 1

\mathrm{r_A=2 r_B }


Option: 2

\mathrm{r_A=3 r_B }


Option: 3

\mathrm{r_B=2 r_A }


Option: 4

\mathrm{r_B=3 r_A}


Answers (1)

best_answer

\mathrm{1.45=1.3+I r_A \\ }

\mathrm{ 1.45=1.5-I r_B \\ }

\mathrm{ I r_B=0.05 \\ }

\mathrm{ I r_A=0.15 }

Dividing we get   \mathrm{\frac{r_B}{r_A}=\frac{1}{3} ~Or~ r_A=3 r_B }

Posted by

avinash.dongre

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