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

Define quality, Quality: It is the characteristics of a sound by which ...

Quality: It is the characteristics of a sound by which we can distinguish among two sounds of the similar pitch and the loudness is known as quality of sound.

What is the velocity of the combined system - collision, A 10 kilogram body...

A 10 kilogram body initially moving with a velocity of 10 meters per second makes a head-on collision with a 15 kilogram body initially at rest.  The two objects stick together

How do you define free radical addition reaction?, When unsaturated compoun...

When unsaturated compounds undergo addition reactions with free radicals, it is known as free radical addition reaction.

Cosmological constant, Cosmological constant; Lambda The constant intr...

Cosmological constant; Lambda The constant introduced towards the Einstein field equation, planned to admit static cosmological solutions. During current philosophical view wa

Two cars in 2-dimensional collision, Two Cars in 2-Dimensional Collision ...

Two Cars in 2-Dimensional Collision Inelastic Collision :  Collisions among objects are governed through laws of momentum and energy. While a collision occurs within an isola

Angular motion, find angular velocity, acceleration and angle given constan...

find angular velocity, acceleration and angle given constant speed,and length

What are secondary cells, Q. What are secondary cells? Give an example? ...

Q. What are secondary cells? Give an example? i) They are rechargeable. ii) The chemical reactions which take place in secondary cells are reversible. iii) The active mat

Motion of a swing, Motion of a swing Periodic Motion :  Motion that re...

Motion of a swing Periodic Motion :  Motion that repeats itself in equal intervals of time is known as periodic motion.

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