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

Moment of force, with the aid diagram, explain what meant by moment of forc...

with the aid diagram, explain what meant by moment of force

Solve quesn, Your friend has gifted an earphone set to you. While music is...

Your friend has gifted an earphone set to you. While music is on you will try to oppose the two ear phone pieces to attract. Task-I: Will they attract? If yes, why so? Task-II: Why

Interferometer, working and construction of interferometer

working and construction of interferometer

Maxwells equations, Maxwell's equations (J.C. Maxwell; 1864): Four ele...

Maxwell's equations (J.C. Maxwell; 1864): Four elegant equations that describe classical electromagnetism in its entire splendor are following.

How much kinetic energy has an electron, In a vacuum tube, electrons accele...

In a vacuum tube, electrons accelerate from the cathode element to the plate element, which is maintained at a positive potential with respect to the cathode. If the plate voltage

Define the temperature and pressure conditions, What is the name of the tem...

What is the name of the temperature and pressure conditions at which water can be in the solid, liquid and gas phases simultaneously? Ans: The name of the temperature and pr

Work power energy, A block of mass 2 kg is pulled up on a smooth incline ma...

A block of mass 2 kg is pulled up on a smooth incline making angle 30 degrees with horizontal . if block moves with an acceleration of 1 m/s2 , find a) Power delivered by the pull

Define frozen solid, Define Frozen Solid (Moscow Phys-Tech)? Evaluation...

Define Frozen Solid (Moscow Phys-Tech)? Evaluation how long it will take for a small pond of average depth D=0.5 m to   freeze entirely   in   a   very cold winter, when   the

Method of making magnet, Method of Making magnet: There are two types o...

Method of Making magnet: There are two types of making magnets. Single Touch Method: a. In this method a bar magnet is rubbed on a hard steel bar. b. The magnet is k

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