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

Optic fiber, why the reflective index of cladding is lower then in core of ...

why the reflective index of cladding is lower then in core of a fiber optic?

Magnetic material, If the material is in the crystalline form, how will the...

If the material is in the crystalline form, how will the susceptibility be affected?

Inertial frame of reference, Inertial Frame of Reference : If in a given sy...

Inertial Frame of Reference : If in a given system a free object does not experience any acceleration or force, the system is called the inertial frame. Any reference frame that mo

Rate, What is rate of an assignment question?

What is rate of an assignment question?

Constant positive velocity, Constant Positive Velocity Observe in which...

Constant Positive Velocity Observe in which the object below moves along with a constant velocity within the positive direction. The dot diagram shows in which each consecutive

Thermistors, Thermistors Insulators and semi-conductors behave in a dif...

Thermistors Insulators and semi-conductors behave in a different way when the temperature increases, because their resistivity decreases. That is: the resistance of an insulato

Explain kirchoff''s voltage law, Kirchoff's Voltage Law determines that th...

Kirchoff's Voltage Law determines that the algebraic sum of the products of currents and resistances in every of the conductors in any closed path in a network plus the algebraic

Determine the magnitude of the single resultant force, The beam below is su...

The beam below is supported at A and B.  F1 and F2 in kN are given in P21 and P22 respectively.  F3 in kN is given in P23 and the couple in kN.m is given in P24.  Assume that F1, F

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