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Mind Palace on DC circuits (Hindi)
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Summary of DC circuits

Udit Gupta is teaching live on Unacademy Plus

Udit Gupta
A Mechanical Engineer from NIT Allahabad here to help learners with physics. Also a Star ⭐ educator.

U
Unacademy user
1600 years ka " odd days 0 " kaise aaya ...... please help.
1600/400 = divisible.
sir what is retentivity ?? and, effect on angular momentum while point moves towards origin...
Udit Gupta
9 months ago
retentivity is the magnetic nature left in material when we remove the magnetic field across it. you can better study its effect in the hysteresis curve.
Udit Gupta
9 months ago
for the latter part i'm not getting what you are trying to ask.
Nishant Patil
9 months ago
A mass is moving towards the origin along the x-axis with constant velocity,then it's angular momentum with respect to origin.....
Nishant Patil
9 months ago
thanks sir!!!!
Udit Gupta
8 months ago
that should be zero because the perndicular distance from origin to the line of motion of particle is zero..
Nishant Patil
8 months ago
thanks..
is that dynamic and static resistant part in mains syllabus? I didn't read it in any book
Udit Gupta
7 months ago
In semiconductors ncert
  1. MIND PALACE UDIT GUPTA


  2. WELCOME TO THE 5TH MIND PALACE! TODAY WE DISCUSS DC CIRCUITS DON'T FORGET TO CHECK THE SPECIAL CLASSES Apps 1 Other bookmarkt unacademy Home minutes boday udt o e Coures, Topics &Educatos Browse Courses Railway Examinations Class 12 NTA-UGC NET GATE (Civil) RPSC CTET MPSC SSC CGL IT JEE Exams CAT UPSC CSE GATE (CS and IT) CDS/ NDA/ AFCAT Sol: Classification and Distribution Exam Oriented Discussien on Numbers and Operation Understanding Fluid Flow through Top Festivals and Fairs of Rajasthan Regstraticope at 12.00 PM Hegistrabo op at 1200 P 21 sumanuatawww@


  3. Ohm's Law If the physical conditions of the conductor (length, temperature, mechanical strain etc.) remain same, then the current flowing through the conductor is directly proportional to the potential difference across its two ends, i.e., 1 V V-IR Limitations of Ohm's law: It is not a universal law that applies everywhere under all conditions. Ohm's law is obeyed by metallic conductors, that too at about normal working temperatures Resistance The property of a substance by virtue of which it opposes the flow of current through it. pl m Materials: Crystal, rectifiers, thermistors, semiconductors. Conditions: (a) At very high temperatures (b) At very low temperatures (c) At very high potential differences A ne2TA


  4. Basic features of Ohm's law Vector form of Ohm's law:/. , where conductivity 1/ and jl the current density. (i) Slope of the line (ii) Graph between V and I for a metallic conductor Temperature dependence For a conductor: R.-Ro(1 + t + t2) Ro = Resistance at 00C Rt Resistance at to , -Temperature coefficients Resistance R Ro(1 +at) (8~0) -Ag : Specific resistance of the material of the conductor Also for resistivity: Pe-: Poll + Resistivity It is numerically equal to the resistance of a substance having unit area of cross- section and unit length 4 Crystal rectifier V -I curve for non-ohmic substance is not linear . Static Resistance: Rs stane Dynamic Resistance: Rd . _tano


  5. Wheat stone Bridge In balanced condition, if, R1 R3 R2 R4 then I 0 Kirchhoff's rule Ry Junction Rule : At any junction of circuit, the sum of currents entering and leaving charge) in potential around any closed loop must T-1+ must be zero ( 1 = 0). (Conservation .Loop Rule : The algebraic sum of changes Series Grouping: For n identical batteries nE be zero. nr + R Parallel Grouping: With n identical batteries: net net Problem Solving Strategy -i net E; R + R Distribute current at various junctions starting from +ve terminal 1. 2. Pick a point and begin to walk around a closed loop 3. Write the voltage change with sign convention 4. Apply KVL across the required no. of loops 5. Solve the set of simultaneous equations Mixed Grouping: For n rows of identical batteries with m cells in each row. mr


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