CBSE > Class 12 > Physics | CBSE Board | Homework Help

So, in short In chemistry - solid state & group 15 is removed In phys- communications system & transistor, amplifier, logical gates is removed In maths- binomial distribution & binary operation is removed Is this right or some addition or reduction required in it?

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Deepak Kumar 6 years, 1 month ago

Thanks for the info

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Tushar Bhola 6 years, 1 month ago

Abe pagal hai kya addition and condensation tune pada hi nhi tho tune usse delete hi kar diya vo hai syllabus mai

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Muskaan Vig 6 years, 1 month ago

Addition and condensation polymerisation....topics are in our syllabus.

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Sohan .G 6 years, 1 month ago

Chapter 1 (Solid state) has been deleted • ‘Group-15’ deleted from p-block elements • Classification: natural and synthetic, methods of polymerization (addition and condensation) is deleted from Polymers • Design of Question Paper changed (20 Marks Objective Questions have been added and the total number of questions has increased to 37 from 27) Topics ‘binary operations’ (from unit relations and functions) and ‘repeated independent (Bernoulli) trials and binomials distribution’ (from unit Probability) have been deleted • Chapterwise marks changed .Internal assessment of 20 marks has been added • Design of Question Paper changed (20 Marks Objective Questions have been added and the total number of questions has increased to 36 from 29) .topics junction transistor, transistor action, characteristics of a transistor and transistor as an amplifier (common emitter configuration), basic idea of analog and digital signals, logic gates (OR, AND, NOT, NAND and NOR) have been deleted from chapter 14 • Chapter 15 (Communication System) has been deleted • Design of Question Paper changed (20 Marks Objective Questions have been added and the total number of questions has increased to 34 from 27)

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Ishika Soni 6 years, 1 month ago

in maths binomial distribution is deleted from probablity

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Hasan Azam 6 years, 1 month ago

In chemistry,group 15 is deleted i.e nitrogen family from p block elements

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Hasan Azam 6 years, 1 month ago

I am a PCB student so i dont know about maths but in physics(eye in ray optics and transistor,amplifier of semiconductor and communication system os deletes)

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Factors affecting lateral shift and natural shift

Posted by Sam Adam 6 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Sohan .G 6 years, 1 month ago

Lateral shift depends upon: (i) the increase in the thickness of the glass slab. (ii) the increase in the value of the angle of incidence. (iii)the increase in the value of refractive index of the slab. Normal shift depends upon: (i) the real depth of the object or the thickness of the refracting medium. (ii) the refractive index of the denser medium. The higher the value of(lamda) greater is the Apparent shift (d).

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Two long parallel wires each carrying a current of 1A in the same direction, are placed 1m apart. The force of attraction between them is

Posted by Amit Raj 6 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Ritwik Choudhary 6 years, 1 month ago

2x10^-7 N/m

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ANSWER

A neutron strikes a nucleus of 5 10B and emits an alpha particle. Write down the nuclear reaction for it.

Posted by Rahul Saini 6 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

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Eletric field due to charged solid sphere derivation

Posted by Renu Singh 6 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

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Gsgsddfg

Posted by lily****@***** 6 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Aku❤️❤️ ? 6 years, 1 month ago

Kskkekkskekdd

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How to prepare for mcqs

Posted by Ashish Kumar 6 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Param Dhingra 6 years, 1 month ago

Write down basic concepts and revise them again and again. I followed this strategy in my pre boards and I scored 19 out of 20 in one markers?

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Arisha Ashraf 6 years, 1 month ago

Prefer to ncert for that

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What is the magnitude of pressure that is applied by jhonny sins in his arcade mania of holes

Posted by Md Zahid Hussain 6 years, 1 month ago

CBSE > Class 12 > Physics

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Necrt class 12 ray optics ka last question hai

Posted by Govind Narayan Singh 6 years, 1 month ago

CBSE > Class 12 > Physics

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Please anybody tell me that how to prepare 2book of physics ,,,because i did not know but i didi not like to read it ,,,can i only read previous years question for this????plz

Posted by Abhay Mishra 6 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Vinay Gautam 6 years, 1 month ago

Ya u can plus solve or read some solved sample papers

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Sample paper

Posted by Abhishek Sanpla 6 years, 1 month ago

CBSE > Class 12 > Physics

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State kirchoff's law

Posted by Agnibha Adhikari 6 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Sharma Sk 6 years, 1 month ago

two laws are there 1 law:junction law accordind to which total incoming current is equal to total outgoing current 2 law: sum of the emf is equal to sum of multiple of current and ist corresponding resistance

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Pooja Rawat 6 years, 1 month ago

There are two law

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Numericals

Posted by Danish Rangrezz 6 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Param Dhingra 6 years, 1 month ago

Try solving previous year. Don't try to solve so many of same type

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Describe a simple experiment to show that the polarity of emf induced in a coil is always such that it tends to produce a current which opposes the change of magnetic flux that produces it

Posted by Josna Mary Thomas Thomas 6 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Param Dhingra 6 years, 1 month ago

Proof of lenz law

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Anyone having some doubts can ask me on instagram #raonishant123

Posted by Tanvi Yadav 6 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Tanvi Yadav 6 years, 1 month ago

Bhtt yaad aari apna baap ki

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Vinay Gautam 6 years, 1 month ago

Tu bda n einstein h

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Given the mass of iron nucleus as 55.85u and A = 56,find the nuclear density?

Posted by Keerthana Naveen 6 years, 1 month ago

CBSE > Class 12 > Physics

3 answers

Param Dhingra 6 years, 1 month ago

Constant (might be given in ques paper)

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Shefu ??????? 6 years, 1 month ago

Konsa formula use kiya ha apna??

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Neha Choudhary 6 years, 1 month ago

1.7×10^17

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ANSWER

What is Kirchhoff's law's

Posted by Anaya Singh 6 years, 1 month ago

CBSE > Class 12 > Physics

7 answers

Roshan Shukla 6 years, 1 month ago

KVL (LOOP LAW) states that the sum of potential difference across a loop is zero...

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Muskaan Vig 6 years, 1 month ago

Kirchoff's first law(Junction law) states that current entering a junction is equal to current leaving the junction.....

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Tanvi Yadav 6 years, 1 month ago

Because the kirchoff's law is very long so I can explain it properly on notebook and in this app i can't send you image of that.

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Anaya Singh 6 years, 1 month ago

Why ! What is the problem having to you in telling here

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Tanvi Yadav 6 years, 1 month ago

You can ask me on instagram #raonishant123

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Anaya Singh 6 years, 1 month ago

I know but having some confusion

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Tanvi Yadav 6 years, 1 month ago

Aapko nhi pta?

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ANSWER

Kya gaits h syllabus m

Posted by Santy Baralu 6 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Meghna Sharma 6 years, 1 month ago

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Bending a wari does not affect electrical resistance why

Posted by Alice Abujam 6 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Tamanna Sharma 6 years, 1 month ago

It's not wari, it's wire and seconldy wire ko bend karne se area and length both are not increasing or decreasing so resistance is also same. (RESISTIVITY AND TEMPERATURE ALSO REMAIN CONSTANT),,,,if by bending we done length is half or double and anyother then it definitely affect the resistance and same for area.

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Two radiation of frequency v1 and v2 (v2<v1) and havine same intensity incident on a photosensitive surface. Explain in which case more number of electrons will be emitted?

Posted by Syed Zuhed 6 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Is anyone up?

Posted by Khushi Singh 6 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Khushi Singh 6 years, 1 month ago

Yaar job application format bata do pls

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A ? 6 years, 1 month ago

What???

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A) draw a ray diagram for final image formed at distance of distinct vision by compound microscope and write expression for its magnifying power. B) an angular magnification of 30x is desired for a compound microscope using as an objective of focal length 1.25 cm and eyepiece of focal length 5 cm how will you set up the compound microscope Above two questions are given for 5 marks...shuld I write whole derivation or just expression in final exam

Posted by Priyanshi Maurya 6 years, 1 month ago

CBSE > Class 12 > Physics

3 answers

Shefu ??????? 6 years, 1 month ago

(-Vo/uo)(1+ d/fe)

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Shefu ??????? 6 years, 1 month ago

(1+d/f)

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Tamanna Sharma 6 years, 1 month ago

You have to derive it with the help of diagram

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The electric field components in the following figure are Ex = αx, Ey = 0, Ez= 0; in which α = 400 N/C m. Calculate (i) the electric flux through the cube, and (ii) the charge within the cube assume that a = 0.1m

Posted by Ariya A 6 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Pooja Rawat 6 years, 1 month ago

Ncert example h ye samaj nhi aaya kya apko

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Velocity selector?

Posted by Vikash Prajapati 6 years, 1 month ago

CBSE > Class 12 > Physics

3 answers

Muskaan Vig 6 years, 1 month ago

Region in which uniform electric and magnetic fields are present and are perpendicular to each other....some charged particles go through them without any deflection but some get deflected this helps in selecting a particular charge of particular velocity..

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Srushti Dhanmane 6 years, 1 month ago

V = E/B

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Pooja Rawat 6 years, 1 month ago

It is a device which accelerate the charge particle

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