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

Why don''t diode as a battery?, Why because it is not a source as Li-ion ba...

Why because it is not a source as Li-ion battery. If we want to measure the voltage(build in voltage) with in the diode we have to use the external source. We can''t directly measu

Friction, deriving formula of friction

deriving formula of friction

Estimate ground level no concentration, A stack emitting 85 g/s of NO has a...

A stack emitting 85 g/s of NO has an effective stack height of 100 m. The wind speed is 3 m/s at 10 m, and it is a cloudy summer day.  Estimate ground level NO concentration:

Define entropy of ideal gas, Define Entropy of Ideal Gas? A vessel of ...

Define Entropy of Ideal Gas? A vessel of volume V 1 contains N molecules of an ideal gas held at temperature T and pressure P 1. The energy of a molecule may be written in t

Quantum., what is quatum number

what is quatum number

Boltzmann constant, Boltzmann constant; k (L. Boltzmann) This is a cons...

Boltzmann constant; k (L. Boltzmann) This is a constant that describes the relationship among temperature & kinetic energy for molecules in an ideal gas. This is equal to 1.380

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