badge image

Enroll For Free Now & Improve Your Performance.

User Icon
User Icon
User Icon
User Icon
User Icon

Thank you for registering.

One of our academic counsellors will contact you within 1 working day.

Please check your email for login details.

Use Coupon: CART20 and get 20% off on all online Study Material

Total Price: Rs.

There are no items in this cart.
Continue Shopping
Grade: 12


A voltmeter connected in series with a resistance R1 to a circuit indicates a voltage V1 = 198V. When a series resistance R2= 2 R1 is used, the voltmeter indicates a voltage V2 = 180V. If the resistance of the voltmeter is Rv = 900 ohm, then show that the applied voltage across A and B is 220V.

11 years ago

Answers : (1)

Ramesh V
70 Points

let applied voltage be x V

so, by kirchoffs laws, we have :

let I1 be current in case 1 and I2 be in case 2

so acroess voltmeters , we have    198 = 900I1      . .. (1)

                                               180 = 900I2     ... (2)

and for whole circuit, we have : x - 198 = I1(R1+900)        ... (3)

                                            x - 180 = I2(2R1+900)       ... (4)

on solving eqns, 1 to 4 , we have

x = 220V


Please feel free to post as many doubts on our disucssion forum as you can. If you find any question difficult to understand - post it here and we will get you the answer and detailed solution very quickly.We are all IITians and here to help you in your IIT JEE preparation. All the best.

IIT Kgp - 05 batch

11 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies

Course Features

  • 101 Video Lectures
  • Revision Notes
  • Previous Year Papers
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Test paper with Video Solution

Course Features

  • 110 Video Lectures
  • Revision Notes
  • Test paper with Video Solution
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Previous Year Exam Questions

Ask Experts

Have any Question? Ask Experts

Post Question

Answer ‘n’ Earn
Attractive Gift
To Win!!! Click Here for details