Prof. Hemant Dongre, Internal Resistance of Cell using Potentiometer

[@studymaterialhub620]

Sir.....we are from vartak college....aap hame phsics padhate ho...yaha aapko dekh kar dil khush ho gaya...... thnx sir nice explanation

[@rekhasapaliga6763]

Thank u soooo much sir...💯helped me so much during practical exam👨‍🏫

[@Byrururi]

Practical kese gaye aapke? Kaise karate hai exam?

[@amitkulshrestha2004]

Very clear and precise explanation 👍

[@Legit_India]

Sir, when key 2 is open, we will not input any resistance in the resistance box therefore L1 is constant,but as soon as we close k2, we have to input differenr resustances and find values of L2,so L1 needs not to be changed. Am i right sir? I have Skill test so just comfirimg pls reply asap.

[@vignesh.s7100]

Yes L1 is constant , U have to tabulate only R and L2

[@amitkulshrestha2004]

​@@vignesh.s7100 Yes

[@PhysicsEasyWithSoumya]

What value or R should we take sir?

[@sushmita586]

Very Nice explanation.

[@sooperkidsglory]

What about L1?

[@sunomaryam484]

Love from Pakistan

[@rustynail3519]

Will the L1 value remain the same throughout the experiment?

[@laukikdongre5791]

Yes. L1 is the first reading when the cell is not shunted by any resistance. It remains constant.

[@hemantdongre3718]

Yes. As long as you do not change the position of rheostat and supply voltage.

[@54_bhavikasakpal69]

Thank you sir🙏

[@saiparkhe23]

at what value should we keep the rheostat ?

[@hemantdongre3718]

Ideally we should adjust it to get larger value of L1. That can give you more accuracy.

[@shreelekhamishra6048]

How you prepare the cell of which we need to calculate internal resistance ,I want to know how you prepare + ve end and negative end , how you join the wires inside the battery ( cell )

[@hemantdongre3718]

To avoid the making of new primary cell each time and its complications, we use dry cell that is available in the market. We solder the wires at its terminals.

[@pooranjangid730]

What is use of Rh in this ckt

[@hemantdongre3718]

You can change the potential gradient along the wire using rheostat. By this you can increase the balancing length for emf to be greater and thus the accuracy of the readings will be more.

[@pooranjangid730]

@@hemantdongre3718 thnx sir

[@sanghavijoshi7418]

Thank you sir

[@SindhuChavan-g8g]

Sir reading kashi ghyaychi

[@s.3421]

👍🏻

[@LuckyRajput-pm3ls]

I am a manufacturer of resistance box or reostate and loading reostate plug key

[@nath3846]

Confusing

[@physicsncbshwetha5728]

Sir we want take battery of 5 v only on what basis we select range of battery please reply sir IAM working as junior lecturer

[@hemantdongre3718]

We take a 5V source as a battery source as the potentials we have to balance are of the order of 1.5 to 2 V. For balancing the cell, we need to have more PD between points A and B than the one to be balanced.

[@wisamkayani9634]

Sir can you tell how formula is derived

[@vaibhavpawar9367]

Thanks sir

[@zorawar1623]

EXPLAIN IN HINDI/MARATHI

[@karankamble268]

👍🏻