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CBSE test papers

Posted by Nisa Khan 6 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What us eddy current and derived it

Posted by Aman Rajbhae 6 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Aadi Ahluwalia 6 years, 3 months ago

Induced current ÷ Resistance

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ANSWER

Plot diagrams to show the force on a dipole in non- uniform electric field, if : A. E is parallel to p B. E is antiparallel to p.

Posted by Neetu Raicha 6 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

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a wire of resistance 16 R is bent in form of circle. what is effective resistance between ends of diameter AB?

Posted by Aryan Bishnoi 6 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Gaurav Seth 6 years, 3 months ago

When it is bent to form circle, the ends of diameter seperates the circle into semicircles in such a way that the two semicircles make a parallel connection in the circuit.Also both the semicircles have equal circumference therefore they have equal resistance.We get 4R as the resistances of the semi circles {8R=4R+4R}.

Therefore 1/effective resistence =1/4 + 1/4 =1/2 ===Effective resistance=2R

2Thank You

ANSWER

In the figure given below the equivalent capacitance between Aand B

Posted by Sudhir Raj 6 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

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What are important topics in ac

Posted by King Manan Jain 6 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

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Derivation of microscopes

Posted by Sahil Rao 6 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Gaurav Seth 6 years, 3 months ago

The angular magnification of a compound microscope is the ratio of the angle subtended by the final image at the eye to the angle subtended by the object at the eye, when both are placed at the least distance of distinct vision.

This is the required expression for angular magnification.

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draw a graph showing the variation of linear magnification with image distance for a thin convex lens. how can this graph be used for finding the focal length of the lens

Posted by Khushi Jain 6 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

can anyone suggest me best topic for investigatory project

Posted by Harsh Sahu 6 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Janvi Dahre 6 years, 3 months ago

Logic gates are very easy

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How alpha particle repel from nucleus?

Posted by Navnish Kumar 6 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Vemula Chowdary 6 years, 3 months ago

most of the binding energy of nucleus can explained as being due to formation of alpha particles when some nuclear decay alpha particles excited alpha particle having electrostatic charge + 2 will repel each other

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Why must electrostatic field at tha surface of charged conductor be perpendicular to every point???

Posted by Surbhi Kashyap 6 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Noorsaba Khan 6 years, 3 months ago

If the electrostatic field is not perpendicular then it would breaks into non zero component so work will done in moving charge on conductor as conductor would behaves as non equipotential surface.

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Electrostatic potential energy ka knsa derivation jada poucha jata h

Posted by Akriti Bisht 6 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Aadi Ahluwalia 6 years, 3 months ago

Ub - Ua = Wab

1Thank You

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Gauss theorem ki knsi application jada pouchi jaati h ?

Posted by Akriti Bisht 6 years, 3 months ago

CBSE > Class 12 > Physics

4 answers

Ayushi Raj 6 years, 3 months ago

1st aur 3rd wala important hai....2nd application is not so important never or rarely asked!!! Hope it helps!!!

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Faizan Ayyub 6 years, 3 months ago

Plain sheet or sphere se related

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Akriti Bisht 6 years, 3 months ago

Mai application ki baat krri hu gauss theorem ki 3 applications h orr knsi jaada pouchi jaati h

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Shreyansh Kumar 6 years, 3 months ago

Obviously gaussian surface se related questions!.

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Blue print of class 12 chapter wise

Posted by Abhinav Garg 6 years, 3 months ago

CBSE > Class 12 > Physics

3 answers

Priya Dharshini ? 6 years, 3 months ago

U may get unit wise in net wieightage of chapters and ya.. blue print

0Thank You

Faizan Ayyub 6 years, 3 months ago

No chapterwise blueprint issued by Cbse but unitwise blueprint is issued which is available on Cbse site

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Vemula Chowdary 6 years, 3 months ago

It's still not released

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Pls send me physics project file

Posted by Aadi Ahluwalia 6 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

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A proton is placed in a uniform eletric field directed along the position X-axis. In which direction will it tend to move?

Posted by Tejveer Rathi 6 years, 3 months ago

CBSE > Class 12 > Physics

2 answers

Ak Tech 6 years, 3 months ago

Towards x axis

1Thank You

Sk Goyal 6 years, 3 months ago

Towards X -axis

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ANSWER

Why capacitor blocks Dc

Posted by Himanshu Sharma 6 years, 3 months ago

CBSE > Class 12 > Physics

3 answers

Neha Choudhary 6 years, 3 months ago

In short ,frequency of dc is 0 and we konw that XL=1/frequency so XL will be vrry high

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Gaurav Seth 6 years, 3 months ago

A Capacitor can store the charge as it has two electrodes with dielectric media in between. It does not allow any current to pass through it.

A capacitor stores energy as a function of voltage and resist changes in voltage by drawing current from or supplying current to the source of the voltage change, in opposition to the change.

If a constant voltage (DC) is applied across the capacitor it charges up to some value decided by the voltage and the capacitance. Q=CV

If the voltage is always changing over time (AC) the capacitor attempts to keep it constant. I=C.dV/dt. thus the current appears in the circuit

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Sk Goyal 6 years, 3 months ago

Because it's resistance will be infinite

2Thank You

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What is Quantization of electric charge

Posted by Vishal Rajawat 6 years, 3 months ago

CBSE > Class 12 > Physics

2 answers

Shreyansh Kumar 6 years, 3 months ago

Till now we are half succesful in finding quarks which is dividing an electric charge , but its not stable and gets divided for a very short period of time

1Thank You

Yogita Ingle 6 years, 3 months ago

The quantization of electric charge means that the total charge of the body is always an integral multiple of a basic quantum of charge (e) i.e

q = ne where, n = 0, ±1, ±2, ±3, .....

The basic cause of quantization of electric charge is that during rubbing only an integral number of electrons can be transferred from one body to another.

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Derivation of simple microscope and compoung microscope

Posted by Vemula Chowdary 6 years, 3 months ago

CBSE > Class 12 > Physics

2 answers

Vemula Chowdary 6 years, 3 months ago

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Shreyansh Kumar 6 years, 3 months ago

Unable to post here ☺

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Semiconductor devices and digital circuit chapter is in or removed

Posted by Udit Varshney 6 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Ron Vineetahuja 6 years, 3 months ago

It is in the syllabus

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ANSWER

Where the practical would take place.

Posted by Kushal Mishra 6 years, 3 months ago

CBSE > Class 12 > Physics

4 answers

Neha Choudhary 6 years, 3 months ago

Now cbse give in writen that practical will be held on ur own school as pr the old tradition

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Neha Choudhary 6 years, 3 months ago

At ur shool

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. Choudhary 6 years, 3 months ago

No at respective schools

1Thank You

Sk Goyal 6 years, 3 months ago

At the centre of examination

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ANSWER

Topic AND gate and also draw truth table project is good

Posted by Dolly Maurya 6 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Is human eye not in syllabus of physics

Posted by Asheesh Yadav 6 years, 3 months ago

CBSE > Class 12 > Physics

4 answers

Aditya Dwivedi 6 years, 3 months ago

not in syllabus for board exam 2020

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Ron Vineetahuja 6 years, 3 months ago

It is in syllabus

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Kajal Kunwar 6 years, 3 months ago

Konsa plzźz tell me

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Rajnish Shridhar 6 years, 3 months ago

Yes it is not syllabus

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Where will our board practicals will be conducted with in our school or in other schools

Posted by Adavya Kayasth 6 years, 3 months ago

CBSE > Class 12 > Physics

6 answers

Priya Dharshini ? 6 years, 3 months ago

IN school it self but videos of each student will be captured of practical and a invisilator of cbse with the examiner would come to see all students performing the practicals. It would be strict this time.

0Thank You

. Choudhary 6 years, 3 months ago

In same school bt will b held strictly by external examiner appointed by cbse..

1Thank You

Adavya Kayasth 6 years, 3 months ago

How you are confirmed

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Dãñīyã Arshãd? 6 years, 3 months ago

Earlier they were going to be held in different schools but now... practical exams will be held in the same school you study

1Thank You

Gagan Singh 6 years, 3 months ago

It in confirm