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https://www.youtube.com/watch?v=zrAqQ6NQnFk

2-right-hand-thumb-rule-and-magnetic-field-in-a-circular-loop-chapter-13-science-class-10-ncert This video explains about right hand thumb rule to identify direction of magnetic filed and magnetic field in center of a circular loop.

https://youtu.be/4hbkSYGPiAU

4-Resistances-in-series-chapter-12-electricity-ncert-science-class-10 This video explains resistancers in series with experimwent.

Office partition white plywood 6 ft × 7ft White plywood at the rate of 30 RS per square ft. Market rate 45 RS per square ft.

https://youtu.be/Iuv6hY6zsd0

The Original Double Slit Experiment Light is so common that we rarely think about what it really is. But just over two hundred years ago, a groundbreaking experiment answered the question that ...

P-N junction diode characteristics :-
===========================
Before we can use the PN junction as a practical device we need to firstly bias the junction.
ie connect a voltage potential across it. On the voltage axis.
“Reverse Bias” refers to an external voltage potential which increases the potential barrier.
An external voltage which decreases the potential barrier is said to act in the “Forward Bias” direction.

There are two operating regions and three possible “biasing” conditions for the standard Junction Diode and these are:

1. Zero Bias – No external voltage potential is applied to the PN junction diode.
2. Reverse Bias – The voltage potential is connected negative, (-ve) to the P-type material and positive, (+ve) to the N-type material across the diode which has the effect of Increasing the PN junction diode’s width.
3. Forward Bias – The voltage potential is connected positive, (+ve) to the P-type material and negative, (-ve) to the N-type material across the diode which has the effect of Decreasing the PN junction diodes width.

Specific Heat Capacity Definition:
Specific heat capacity is the amount of heat energy required to raise the temperature of a body per unit of mass. In SI units, specific heat capacity (symbol: c) is the amount of heat in joules required to raise 1gram of a substance 1 Kelvin.

Molar specifc heat capacities
for monoatomic gas
Cp = 5/2 R, Cv = 3/2 R

for diatomic gas
Cp = 7/2 R, Cv = 5/2 R

diatomic gas with vibrational energy
Cp = 9/2 R, Cv = 7/2 R

There are 4 laws in thermodynamics.

Zeroth law of thermodynamics – If two thermodynamic systems are each in thermal equilibrium with a third, then they are in thermal equilibrium with each other.

First law of thermodynamics – Energy can neither be created nor destroyed. It can only change forms. In any process, the total energy of the universe remains the same. For a thermodynamic cycle the net heat supplied to the system equals the net work done by the system.

Second law of thermodynamics – The entropy of an isolated system not in equilibrium will tend to increase over time, approaching a maximum value at equilibrium.

Third law of thermodynamics – As temperature approaches absolute zero, the entropy of a system approaches a constant minimum.

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Total Work done by kuli in displacement of an object?

Few books have incorrect interpretation that work does equals to zero.
But basically kuli has done 3 works in different directions.
1. picking up the object,
2. Holding object and moving forward.
3. Relieving object at the place.

Here first and third work is in opposite direction so it will get cancelled by each other.

Now we have left with the work done by 2nd.

Here few books explain while holding we apply the force perpendicular to the ground, that's where it gets wrong since force is a reaction of the kuli from the ground that has a forward component
therefore force applied on the object will have a direction in mid of horizon and perpendicular.

Therefore total work done is not zero when displacement is not zero.

2nd explanation I found somewhere that gravity potential for earth like system everywhere is same. Therefore work done is 0.

This is incorrect in the sense, that gravity potential is same for surfaces which are purely spherical, but earth's shape is an oval. So it is incorrect explanation as well.