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

Determine dielectric strength of transformer oil, The dielectric strength o...

The dielectric strength of transformer oil should be (A) 100 V.        (B) 5 KV. (C) 30 KV.        (D) 132 KV. Ans: The dielectric strength of transformer oil mu

Physical science, consider an experiment where you drop an object. brieffly...

consider an experiment where you drop an object. brieffly decribe your proposed experiment. what is the indepentent variable and dependent.

Briefly explain eddy current laws and hysterious laws, Eddy currents can be...

Eddy currents can be briefly explained as currents produced due to induced emf in the form of eddies or ripples. Hysteresis laws mainly consists of 2 topics retentivity and coerci

Fiber optics manufacture and fiber optics system manufacture, What is the d...

What is the difference among a fiber optics manufacture and a fiber optics system manufacture? It is a question that would sound silly in other industries although not in this

Calculate velocity of the bullet - force, A 0.040-kg bullet is fired into a...

A 0.040-kg bullet is fired into a 3.50-kg block of wood, which was initially at rest.  The bullet remains embedded within the block of wood after the collision. The bullet

Quantam mechanics, what is the physical significance of Compton effect?

what is the physical significance of Compton effect?

#tite.., what is gravitional constant? mention its SI value

what is gravitional constant? mention its SI value

Advantages of three phase system over single phase system, Advantages of th...

Advantages of three phase system over single phase system  a) Rotating magnetic field can be set up, by passing three-phase current by stationary coils.   b) Polyphase s

Making an observation nest for ants, Making an observation nest for ants ...

Making an observation nest for ants An observation nest for the study of the life story of ants can simply be made as follows. Make a wooden U from three 30 cm lengths of w

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