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

What point in the balls travel to home plate, Q. When a radar gun utter the...

Q. When a radar gun utter the pitch is 90 miles per hour at what point in the balls travel to home plate is the radar gun measuring the velocity? Answer:- The measu

Michelson interferometer, describe the construction and working of michelso...

describe the construction and working of michelson''s interferometer explain the formation of circular fringes how will you use these fringis in the determination of difference in

Degenerate and non-degenerate semiconductor, THE SEMICONDUCTOR in which num...

THE SEMICONDUCTOR in which number of electrons or holes is smaller than N c  and N v  density of state in CB or VB are called non-degenerate semiconductor. The general exponential

Spectrum and electromagnetic radiations, Spectrum and electromagnetic radia...

Spectrum and electromagnetic radiations: What is a spectrum? Ans: A spectrum is a group of wave lengths or frequencies. What  are the electromagnetic radiations? Ans:

Properties of positive rays, (i) These are positive ions having similar mas...

(i) These are positive ions having similar mass if the experimental gas does not have isotopes. However if the gas has substances then positive pulses are group of positive ions ha

Determine the minimum pressure, The water level in a tank is 20 m above the...

The water level in a tank is 20 m above the ground. A hose is connected to the bottom of the tank, and the nozzle at the end of the hose is pointed straight up. The tank is at sea

Evaluate the path of the magnetic field, A straight vertical wire passes by...

A straight vertical wire passes by a wooden table top. The wire carries an upward directed current. Evaluate the path of the magnetic field of the wire at a point on the table top

Find the value of g by free fall method, initial position time the vibra...

initial position time the vibration mean time time period of the bob t time

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