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High School/JEE/NEET/IPhO Physics | 17-19 Yrs

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  1.  
    2. sir in solving kvl for A-B u did not consider 6ohm resistance why??????????????????
    2 years ago by

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  2.  
    3. sir thank u so much i could do this by kvl kcl and thenvien method ..now im loving physics so much
    5 years ago by Sarju Panchal

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  3.  
    4. how it is discharig
    5 years ago by Sarju Panchal
    Ans 1 ->
    got it sir didnt read question properly
    5 years ago by Sarju Panchal

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  4.  
    5. superb teaching ..aman bansal was ashish sir student and i think he scored 120/124 in jee advanced physics..ashish sir best
    5 years ago by Sarju Panchal

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  5.  
    6. can we find by kvl?
    5 years ago by Sarju Panchal

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  6.  
    7. what is the formula of time constant
    5 years ago by Ujjwal Kar
    Ans 1 ->
    time constant = resistance X capacitance
    5 years ago by Md Zakie Akhtar Ansari

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  7.  
    8. in 1:55 during applying KVL equation of this loop you take (-q/v) but why not (+q/v)
    5 years ago by Ujjwal Kar
    Ans 1 ->
    because there is a drop of potential from positive plate to the negative plate of the capacitor
    5 years ago by Md Zakie Akhtar Ansari

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  8.  
    9. To find out the power with 100 volts battery can't we just use p=v^2/r
    5 years ago by Rockers Pride

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  9.  
    10. Why in integration part -ln(cv-q) is written instead of ln(cv-q)
    5 years ago by deependra kapoor

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  10.  
    11. Why current in 30V battery is directed from lower potential point to higher potential point?
    6 years ago by

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  11.  
    12. the charge flowing through a resistance R varies with time t as Q = at-bt*2,where a and b are positive consstants.the total heat produced in R is.
    6 years ago by Akshay Kumar

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  12.  
    13. qusets thermal effect of current question number 32 institude give same questoin but answer is different please check institude answer give 20 qusets answer 40
    6 years ago by narayan kalani

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  13.  
    14. is the method of finding thevenins emf applicable for all cases?
    7 years ago by abhishek pullela
    Ans 1 ->
    yes
    5 years ago by Sarju Panchal

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  14.  
    15. Respected sir, My question is why workdone by battery is equal to the product of charge and potential difference?
    7 years ago by
    Ans 1 ->
    you can see it like this... we know W=F x S .. so for a point particle such as a charge F=qE and let S be the length of the conductor with one side connected to higher potential V and the other side at a lower potential 0... we know that for a cell to move an electron through a potential difference V, V=ES where S is the length of the conductor so substituting the values IN W=F x S we can write W=qES and ES=V so W=qV Btw: E is the electric field generated from V to 0 potential hope this helps :-)
    6 years ago by ABHISHEK SHANKAR

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  15.  
    16. Can we solve this question by finding current I and then using H=I^2 R*T ??
    7 years ago by Tejan Gupta

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  16.  
    17. how is i=i0-i0t/T?
    7 years ago by Sruthi rajanala
    Ans 1 ->
    Thats the way how we write the equation of a straight line... open the chapter of straight line in co-ordinate geometry and see how to write the equation of a straight line in point-slope form...
    7 years ago by Physics Galaxy

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  17.  
    18. sir in most of the examples we consider the potential at the positive termial of battery to be v (its voltage) and across the neggative terminal we consider it as 0(making the pd across the terminals v) so sir here across the 30v battery why didn't we consider the pd to be 30 and 0 volts?
    7 years ago by Ajay Vashishtha
    Ans 1 ->
    In one circuit you can consider zero only at one point of circuit and here I have taken it at another terminal so all other potentials of circuit are to be taken with respect to this terminal... however if you wish you can take here 0 and 30 then change other potentials accordingly, result will not affect...
    7 years ago by Physics Galaxy

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  18.  
    19. sir what if the cell has internal resistance R will the energy absorbed be EI-I^2R or EI ? plz reply as soon as possible
    8 years ago by Khushboo Jain
    Ans 1 ->
    it will be EI- I^2R since P=IE where E is the potential difference Va-Vb that is E-IR... hope this helps :-)
    6 years ago by ABHISHEK SHANKAR

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  19.  
    20. what is EMF?????
    8 years ago by samar
    Ans 1 ->
    electromotive force
    8 years ago by divyansh singh jadon
    Ans 2 ->
    Electromotive force also called emf(measured in volt) is the voltage developed by any source of electrical energy such as a battery or dynamo. It is generally defined as the electrical potential for a source in a circuit.A device that supplies electrical energy is called a seat of electromotive force or emf. Emfs convert chemical mechanical and other forms of energy into electrical energy.The product of such a device is also known as emf.
    7 years ago by Lakhi Kanta Das

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  20.  
    21. in the middle branch of the circuit where the 10 V battery is there , according to loop 1 current of 2 A flows in downward direction but according to loop 2 the current flowing is 2 A in the upward direction . how is this possible?
    9 years ago by manoj kumar
    Ans 1 ->
    Pl watch the video again carefully, due to both loops current of 2A is flowing in same direction and total current through the branch is 4A...Initially before solving we don't know actual directions of current so we can consider any direction and after solving equation the sign of current gives us the actual direction of current..
    9 years ago by Physics Galaxy

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