Search Colleges, Courses, Exams, Questions and Articles

Ask a query on 8879100846 Ask Login | Sign Up

 

 

› Ask & Answer › Question

Two cells of same emf but different internal resistance r1 and r2 are connected in series with a resistance R. The value of resistance R, for which the potential difference across second cell is zero, if:

Option 1 -

r 2 − r 1

Option 2 -

r1 – r2

Option 3 -

r1

Option 4 -

r2

0 3 Views | Posted a month ago
Asked by Shiksha User

  • 1 Answer

  • R

    Answered by

    Raj Pandey | Contributor-Level 9

    a month ago
    Correct Option - 1


    Detailed Solution:

    Given

    I = 2 E R = r 1 + r 2

    E1 = E2 = E - (i)

    Potential drop across second cell is

    V A − E 2 + I r 2 = v B

    According to question VA – VB = 0

    E2 lr2 = 0

    ⇒ R = r 2 − r 1

Similar Questions for you

Two identical cells connected in series send 10 A  current through a 5 W resistor. When they are connected in parallel, they send 8 A current through same resistance. What is internal resistance of each cell?
A
alok kumar singh

Kindly go through the solution

 

In the shown circuit, current through 4 Ω resistor is

 
A
alok kumar singh

It is balanced wheatstone bridge

 

An ideal engine whose efficiency is 40%, receives heat at 500 K. If required efficiency is 50%, then intake temperature for the same exhaust temperature is
A
alok kumar singh

Kindly go through the solution

 

Consider the circuit shown. Galvanometer resistance is 10 Wand current through galvanometer is 3 mA. Find the resistance of shunt.

 
A
alok kumar singh

Since Gand S are in parallel

-> VG = VS

->3mA * 10 = 8A * RS

->RS = 3.75mW

If electric current passing through a conductor vanes with time as I = I0 + βt, where I0 = 20A,β = 3A/s, then find charge flow through conductor in first 10 sec.
A
alok kumar singh

∫ I . d t = ∫ 0 1 0 ( 2 0 + 3 t ) d t

= ( 2 0 t ) 0 1 0 + 3 ( t 2 2 ) 0 1 0 = 3 5 0   C

Get authentic answers from experts, students and alumni that you won't find anywhere else

Sign Up on Shiksha

On Shiksha, get access to

  • 65k Colleges
  • 1.2k Exams
  • 688k Reviews
  • 1800k Answers

Learn more about...

Share Your College Life Experience

Write a Review

Didn't find the answer you were looking for?

Search from Shiksha's 1 lakh+ Topics

or

Ask Current Students, Alumni & our Experts

Ask Now
Community GuidelinesUser Points System
QuestionsDiscussionsTags
×
×

This website uses Cookies and related technologies for the site to function correctly and securely, improve & personalise your browsing experience, analyse traffic, and support our marketing efforts and serve the Core Purpose. By continuing to browse the site, you agree to Privacy Policy and Cookie Policy.

Need guidance on career and education? Ask our experts

Characters 0/140

The Answer must contain atleast 20 characters.

Add more details

Characters 0/300

The Answer must contain atleast 20 characters.

Keep it short & simple. Type complete word. Avoid abusive language. Next

Your Question

Edit

Add relevant tags to get quick responses. Cancel Post