The galvanometer records a current , Physics

Assignment Help:

A galvanometer together with an unknown resistance in series is linked across two identical batteries each of 1.5V. whenthese batteries are connected in series the galvanometer records a current of 1A and when the batteries are in parallel the current is 0.6A. The internal resistance of battery will be ?

Ans) R(net) in first case= R+2r

V=3V,

I=1=V/R=>R+2r=3.......eq(1)

R(net) in Second case= R + r/2

V=1.5V

I=V/R=>.6=3/2R+r

=> 5=2R+r..............eq(2)

Solving eq1 and eq2

we get r= 1/3 or .33 ohms. 

 

 


Related Discussions:- The galvanometer records a current

Application of physics in a technological context, Students are required to...

Students are required to prepare a one page mini-poster explanation of an application of Physics in a Technological, Biomedical, Biological or Engineering context. It is essential

Draw a force diagram, The magnitude of a charge, q, is to be determined by ...

The magnitude of a charge, q, is to be determined by transferring the charge equally to two pith balls. Each of the pith balls has a mass of m, and is suspended by an insulating th

Braggs law, Bragg's law (Sir W.L. Bragg; 1912) While a beam of x-rays ...

Bragg's law (Sir W.L. Bragg; 1912) While a beam of x-rays strikes at crystal surface wherein the layers of atoms or ions are separated regularly, the maximum intensity of the

What do you mean by lateral shift, Q. What do you mean by lateral shift? an...

Q. What do you mean by lateral shift? and What could be the angle of incidence to have maximum lateral shift? Q. For what angle, lateral shift is minimum?

Find the centre of gravity of objects, Finding the centre of gravity of obj...

Finding the centre of gravity of objects Secure a triangular file and place it on a table as a balancing point. Any sharp-edged device with a hat side might be used. Balance se

Distinguish between metals and semiconductors, (a) Distinguish among metals...

(a) Distinguish among metals, insulators and semiconductors on the basis of their energy bands. (b) Why are photodiodes used preferably in reverse bias condition? A photodiode i

Uniform Motion, It normally takes maria 10 minutes to travel 5.0 miles to U...

It normally takes maria 10 minutes to travel 5.0 miles to UTPA along a straight road. Maria leaves home 15 minutes before class begins. Delays caused by a broken traffic light slow

Mechanical energy, An object falls from a high tower and lands on a high hi...

An object falls from a high tower and lands on a high hill with an alpha angle. Then he jumps while going down the hill. How long is the distance between when the ball landed and t

Circular polarisation, Circular Polarisation Circular polarisation pro...

Circular Polarisation Circular polarisation produced from a linearly polarised electromagnetic wave through a quarter-wave plate.

Define elastic fatigue, It is the need of elastic strength of a substance w...

It is the need of elastic strength of a substance when subjected to repeated stresses and strain. If the substance is reserved undisturbed for some time, the previous properties ar

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd