Home
Class 12
PHYSICS
A cell of emf 1.4 volt gives a balance p...

A cell of emf 1.4 volt gives a balance point 30.0 cm length of potentiometer wire, for another cell, the balance point shifts to 45.0 cm. Find the emf of the second cell.

Text Solution

Verified by Experts

`E_(1)= 1.4` volt
`l_(1)= 30cm`
`E_(2)`= ?
`l_(2)= 45cm`
We know `(E_(1))/(E_(2))= (l_(1))/(l_(2))`
`rArr (1.4)/(E_(2))= (30)/(45)`
`rArr E_(2)= (45)/(30) xx 1.4`
`rArr E_(2)= (3)/(2) xx 1.4 = 3 xx 0.7 = 2.1` volt
Promotional Banner

Topper's Solved these Questions

  • ELECTRICAL MEASUREMENTS

    BETTER CHOICE PUBLICATION|Exercise Most Expected Questions|7 Videos

  • ELECTRICAL MEASUREMENTS

    BETTER CHOICE PUBLICATION|Exercise Long Answer Type Questions |7 Videos

  • ELECTRICAL DEVICES

    BETTER CHOICE PUBLICATION|Exercise (MOST EXPECTED QUESTIONS 2 MARK)|2 Videos

  • ELECTROMAGNETIC INDUCTION

    BETTER CHOICE PUBLICATION|Exercise NUMERICAL PROBLEMS|26 Videos

Similar Questions

Explore conceptually related problems

A cell of e.m.f. 1 V gives a balance point at 40 cm length of a potentioeter wire. For another cell, the balance point shifts to 60 cm. Find the e.m.f. of the second cell.