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Chapterwise Solutions of HC Verma

HC Verma Physics Part 2 Solutions for Chapter 33 Electric Current

5/21/2012

30 Comments

 
Download HC Verma Solutions for HC Verma Physics Part 2 Solutions for Chapter 33 Electric Current solved by our expert teachers. We have curated solutions for all questions of chapter 33. You can download the Solution of HC Verma - Electric Current and prepare for your upcoming competitive examinations.

Solution of HC Verma Concept of Physics -2- Chapter 33 Electric Current

Download HC Verma Solutions for Chapter 33 for Free in PDF

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30 Comments
Admin
11/3/2012 05:40:05 pm

This is attempt to provide free education to children who are preparing for engineering entrance examination.
If you are having any doubt regarding solving questions of HC Verma or understanding any topic related to this, you may leave your comment.
we will give your answer within 24 hours.
Thank You

Reply
Raman
12/27/2012 05:28:24 pm

Sir this is not about a question ,actually I'am having a doubt in a concept that is the maximum power dissipation across a resistance theorem and according to this the maximum power dissipated across an external resistance is maximum when external resistance is equal to internal resistance....

Reply
Raman
12/27/2012 05:31:57 pm

So sir in the above theorem i didnt get the logic behind this.We have prroved this by maxima and minima because the plot for power dissipated to external resistance is a curve like parabola and it has its maximum value at the point where external resistance is equal to internal res......But sir why does the power dissipate starts decreasing after this...I dont want the mathematical proof but if you can help me in providing the reasoning behing this it would be of great help

Reply
admin
12/28/2012 04:08:10 pm

Dear Raman,
first let us see the factors which are constant. Here EMF of battery e , internal resistance r are constant.
external resistance R, current i and terminal voltage V are variable.
we know that when R is small then current will be high. but current depends upon i = E/(r+R)
power = i²R = E²R/(r+R)²
so, increasing R, we get dual effect i.e. R in the numerator will try to increase the power and R in the denominator will decrease the power. but as r is also present in the denominator so its effect will be reduced because r is greater as compared to R.
Also, if R is very small then we can neglect as compared to r.
indirectly i want to explain that R in the numerator has greater effect than the R in the numerator.
But when R is increasing and is comparable to r, then we cannot neglect R and the current will start reducing due to increasing R.
and even i² will reduce even more. so, we can see that first power dissipation will increase and then decrease with the increasing R.

Reply
Raman
12/29/2012 03:02:26 am

Really Thanks about this Sir because i started to think that there may be some intrinsic logic that is related to the fundamental particles and their interations with each other but forgot that this can only be explained analytically .....

Reply
Rajat
2/17/2013 08:22:30 pm

Sir this ques is from ISC 2012 physics & i m badly struck in this one
....1....2.....3...
A....| |.....B
|...4.......4......|

here 1,2,3 means 1V 2V 3V respectively & we have to calculate the effective EMF between the terminals A & B. Excuse for the bad diagram...

Reply
Rajat
2/17/2013 08:25:15 pm

1V 2V and 3V batteries are in series in upper row and 4V and 4V batteries are in series in second row...

Reply
Admin
2/18/2013 10:10:03 pm

Dear Rajat,

I am not able to understand the diagram.

Reply
Nikhil jain
2/18/2013 12:25:57 pm

plz help!! sir, i have doubt in isc board question paper 2012 Q1_part 2...
<<its an objective question>>

Reply
Admin
2/19/2013 07:49:05 pm

Dear Nikhil,
Please write your question.

Reply
Rajat
2/19/2013 01:05:07 am

Sorry sir i dont know how the diagram messed up i made it correctly..you can delete that thread as i am already through that question.

Reply
Nikhil jain
2/20/2013 07:07:15 pm

IN A CIRCUIT --6V and 8V are in parallel and are so arranged that they hinder each other .Sir, what will be the net emf across the whole circuit......

Reply
Shubhangi Modi
12/20/2013 02:13:18 am

sir I have plenty of doubts in chemistry. and
Since i m going to Dedicated Academy, and am having doubts in conceptual capacitor circuits, m unable to describe the circuit here. Now how can i clear my doubts......????????????

Reply
theyatin
12/22/2013 01:37:27 am

dear,
as as many you can ask we will try to resolve most of your problems.
you can go through problems given in hc verma and ask similar questions from this book.
or you can describe in words.

Reply
Shubhangi
12/22/2013 11:04:46 pm

how to knw that a reaction is a combustion reaction? inshort proper definition.

theyatin
12/27/2013 04:08:46 am

dear,
an abrupt or rapid reaction in which reactant get oxidized in presence of oxygen and exerts heat either with flame or invisible flame.

Reply
shubhangi
12/31/2013 01:32:09 am

Which are combustion reactions, please give reasons for your answer.
1.FeO+Fe2O3 gives Fe3O4
2.CaO +H2o gives Ca(OH)2
3.Na2O2 +H2O gives NaOH +O2
4.SO2+H2O gives H2SO3
5.CaCO3 gives CaO +CO2
6. CaO + CO2 gives CaCO3

Shubhangi Modi
1/1/2014 11:40:25 pm

sir,
I am not receiving solution in 24hours.

Reply
theyatin
1/3/2014 12:52:14 am

dear,you need to ask your question in new post every time.
you can see last post you made don't have any option of reply.

Reply
Shubhangi
1/3/2014 11:43:27 pm

Which are combustion reactions, please give reasons for your answer.
1.FeO+Fe2O3 gives Fe3O4
2.CaO +H2o gives Ca(OH)2
3.Na2O2 +H2O gives NaOH +O2
4.SO2+H2O gives H2SO3
5.CaCO3 gives CaO +CO2
6. CaO + CO2 gives CaCO3

Reply
theyatin link
1/4/2014 01:46:25 am

dear,
i have given link of a page for detail in combustion reaction.
http://www.ucc.ie/academic/chem/dolchem/html/dict/combust.html

Reply
shubhangi
1/5/2014 05:40:06 am

sir, tats d wrng thing u do. u gave d source of my qts ,.. act I had taken qts frm there
do such qts come in jee advance/mains?
after reading that page, I still won't be able to answer for any othr arbitrary reaction whether tat reaction will be combustible or not.

Reply
theyatin
1/8/2014 02:23:38 am

dear,
i am sorry but it is difficult to explain every reaction with proper notification here
if you have had asked about single reaction i would have answered here.

Reply
shubhangi
1/5/2014 06:26:50 pm

for an instant.... is this conversion FeO+Fe2O3 gives Fe3O4 is a combustion reaction????

Reply
theyatin
1/8/2014 02:26:22 am

dear,
it is combination reaction we heat both of these substances to combine them. so it is no combustion. in short we roast both of them to get product.

Reply
Admin
6/22/2014 01:53:55 pm

Dear Students,
Our Teacher is unavailable for few days. We are sorry for this inconvenience. Our teacher will give your answers soon.

Reply
akash
8/19/2014 05:55:57 am

sir, in ques. 33 why is the current in 4ohm resistor = 0 .?

Reply
sourabh
9/2/2014 10:09:40 pm

your 44 b soln is wrong as force is not constant it changes with distance
as force depends on charge and Q=CV and C= E.A/x where x is variable distance so we have to integrate

Reply
sourabh
9/2/2014 10:11:27 pm

sorry its 44 d


Reply
gautam
10/9/2015 07:56:16 pm

Reply



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