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

I think the best method was that used by young itself.. Keep the single source at a very large distance. This will work something like two diff. coherent sources. Hope it may help you...

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P S 6 years, 1 month ago

Constant phase difference and monochromatic ligjt

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Jd Chouhan 6 years, 1 month ago

Small path diffrence

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Sinchana Malagond 6 years, 1 month ago

Having same amplitude, constant phase difference and frequency and also constant waveform.

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ANSWER

How many of you got more than 90% in preboards .

Posted by Kriti Sharma 6 years, 1 month ago

CBSE > Class 12 > Physics

29 answers

Řøhăň Řąjpůť ✌️✊ 6 years, 1 month ago

uhh to first tym Maine kisi se aese baat ki hai... thanks ?it's all just becoz of u. becoz mai introvert type person hoon infact I should say introvert tha .. but tune extrovert kr diya. chl koi ni bye gud n8 ?

5Thank You

Mannat Kaur Khalsa? 6 years, 1 month ago

Stay blessed...

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Mannat Kaur Khalsa? 6 years, 1 month ago

Ok..jii..gd nyt...?..

1Thank You

Řøhăň Řąjpůť ✌️✊ 6 years, 1 month ago

ohh g asi toh Delhi ke hai g. ?

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Řøhăň Řąjpůť ✌️✊ 6 years, 1 month ago

changa g asi aate hai. apna tym nikalne ke ? filhal jaa ra hoon gud n8 ?

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Mannat Kaur Khalsa? 6 years, 1 month ago

Kithe...rehnde o tusi?

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Mannat Kaur Khalsa? 6 years, 1 month ago

Naa.naa...tusi..aaao..othe he milange..tuhanu..

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Řøhăň Řąjpůť ✌️✊ 6 years, 1 month ago

pakka bol . ? pta chle Maine aaon aur tu he gol ho Jaye vaha se. ?

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Řøhăň Řąjpůť ✌️✊ 6 years, 1 month ago

dur nhi hai mere yaha se vese. ???

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Mannat Kaur Khalsa? 6 years, 1 month ago

??koi na aa jo tusi ghuma deyange tuhanu chandigarh v?

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Řøhăň Řąjpůť ✌️✊ 6 years, 1 month ago

ohh accha haaaan ye vhi jagha hai jaha mai nhi gya. ???

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Mannat Kaur Khalsa? 6 years, 1 month ago

I m frm chandigarh....

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Řøhăň Řąjpůť ✌️✊ 6 years, 1 month ago

mannat yrr tu hai kaha se? u mat boliyo ghr se... bus aese he puch raha hoon appropriate lge toh bta diyo. ?

2Thank You

Mannat Kaur Khalsa? 6 years, 1 month ago

Acha.jiii...koi naa....??

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Řøhăň Řąjpůť ✌️✊ 6 years, 1 month ago

asi majbor hai g... kl asi nu schl jana si... ?try kr ra hoon. adjust kr liyo mistake ho toh.

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Mannat Kaur Khalsa? 6 years, 1 month ago

Bdi..cheti so jande o tusi rohan...

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Řøhăň Řąjpůť ✌️✊ 6 years, 1 month ago

? ? dar gya mai.. ? ? bye gud n8 ?

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Mannat Kaur Khalsa? 6 years, 1 month ago

☺☺

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Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

bakwas km kara kr thodi. ? ? ? behtar hoga for ur mind body and soul. advice smjho isey. ? ? ?

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Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

thanks for the dua. ???

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Řøhăň Řąjpůť ✌️✊ 6 years, 1 month ago

? ? ? uski compartment humare 80% ke barabar hai . ? ? ?

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Mannat Kaur Khalsa? 6 years, 1 month ago

Rohan...kitne achi dua maang ra hai?

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Řøhăň Řąjpůť ✌️✊ 6 years, 1 month ago

? ? @Darshana mai fir bhi bataonga . ? ? hope ke tum aage bhi aese he compartment wale marks lao ?

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Mannat Kaur Khalsa? 6 years, 1 month ago

Yr..meri % hmesha..phy ke vjh se km reh jati hai..

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Mannat Kaur Khalsa? 6 years, 1 month ago

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Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

bhai pucha Maine tujhse. ???

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Řøhăň Řąjpůť ✌️✊ 6 years, 1 month ago

? ? ? miss yadav mee too compartment in all subject. ? ? ? ? ? ?

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Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

? ? ? compartment in all subject. ????

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Mannat Kaur Khalsa? 6 years, 1 month ago

Mee☺

1Thank You

ANSWER

What is the weightage of numericals in physics for the class 12 CBSE board exam in 2020?

Posted by Hardik Kumar 6 years, 1 month ago

CBSE > Class 12 > Physics

3 answers

Pankaj Kumar 6 years, 1 month ago

30% of total marks

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Saanvi Poonia 6 years, 1 month ago

Approximately 15 marks

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Sohan .G 6 years, 1 month ago

20 marks approximately. They have not mentioned till this year for how many marks we get sums.

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ANSWER

How many numbers are coming to numerical this year

Posted by Hardik Kumar 6 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Which chapter or topics remove from cbse syllabus??? tell me full details

Posted by Âññü Šîñg*H??? 6 years, 1 month ago

CBSE > Class 12 > Physics

4 answers

Âññü Šîñg*H??? 6 years, 1 month ago

Thanks for your answer Sohan.G

0Thank You

Sohan .G 6 years, 1 month ago

Physics • 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) Physics (Lab Manual) • Experiment 10 (to study the characteristics of a common-emitter n-p-n or p-n-p transistor and to find out the values of current and voltage gains) has been replaced by to determine the wavelength of a laser beam by diffraction in Section B. • Activity (Use of multimeter to (i) identify base of transistor, (ii) distinguish between n-p-n and p- n-p type transistors, (iii) see the unidirectional flow of current in case of a diode and an LED, (iv) check whether a given electronic component (e.g., diode, transistor or IC) is in working order) has been replaced by Use of multimeter to see the unidirectional flow of current in case of a diode and an LED and check whether a given electronic component (e.g., diode) is in working order. • Two Suggested Investigatory Projects have been deleted, namely, 1. To set up a common base transistor circuit and to study its input and output characteristic and to calculate its current gain. 2. To construct a switch using a transistor and to draw the graph between the input and output voltage and mark the cut-off, saturation and active regions.

1Thank You

Mannat Kaur Khalsa? 6 years, 1 month ago

From math binary operations

1Thank You

Jd Chouhan 6 years, 1 month ago

For chemistry solid state removed...

1Thank You

ANSWER

An electron after being accelerated through a potential difference of 100V enters a uniform magnetic field of 0.004T perpendicular to direction of its motion. Calculate the radius of path described by the electron

Posted by Aryan Sachdeva 6 years, 1 month ago

CBSE > Class 12 > Physics

3 answers

Akanksha Kumari 6 years, 1 month ago

Obtain value of velocity using formula 1/2mv^2=qV (v=velocity, V=p.d.) Now from the formula r=mv/qB you'll get the value of r where in this formula, small v is velocity, not p.d.

1Thank You

Sinchana Malagond 6 years, 1 month ago

Use the formula r= qV÷mB Where, q is charge of electron V is applied potential m is mass of electron B is magnetic field value

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Aman Raza 6 years, 1 month ago

MV/qB value put krke a jaega

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ANSWER

The force between two parallel current carrying conductors separated by a distance x is F. If the current in each conductor is doubled and the distance between them is halved, then the force between them becomes

Posted by Taruna Joshi 6 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Aman Raza 6 years, 1 month ago

Force will become 4 times to F

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ANSWER

A infinitely long non conducting cylinder of inner radius 5cm and outer radius 7cm has uniform volume charge density 8.85 × 10^-9 , The magnitude of electric field at distance 10cm from the axis of cylinder is

Posted by Ns H 6 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Janani Chitra 5 years, 9 months ago

10Thank You

ANSWER

Magnetic filed due to a straight wire carrying current and magnetic filed at the point on the axis of a circular coil carrying current syllabus mai h ya nhi

Posted by Archit Nangla 6 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Keshav Kumar 6 years, 1 month ago

not sure about specifically given in the textbook but yes calculating magnetic fields is a part of the syllabus so even this should be included

0Thank You

ANSWER

Please tell me the list of working model for physics class 12.

Posted by Yash Chopra 6 years, 1 month ago

CBSE > Class 12 > Physics

3 answers

Yash Chopra 6 years, 1 month ago

And some other are there?

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Mannat Kaur Khalsa? 6 years, 1 month ago

Rectifier

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Mannat Kaur Khalsa? 6 years, 1 month ago

Tesla coil

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ANSWER

The reactance of a capacitance at 50Hz is 5 oh. If the frequency is increased to 100Hz, the new reactance is....

Posted by Shiristi Gujjar 6 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Rajat Barwar 6 years, 1 month ago

It will become half as reactance is proportional to angular velocity whichh is proportional to frequency. Hope it may help you..

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Yuvraj Singh 6 years, 1 month ago

Xc is inversely proportional to frequency If frequency is increased then capacitive reactance will decrease. => Xc = 2.5 Ohm

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ANSWER

Is it mandatory to prepare working project for physics practical marks..?

Posted by Râhūl ;-),?? 6 years, 1 month ago

CBSE > Class 12 > Physics

4 answers

Kriti Sharma 6 years, 1 month ago

1Thank You

Manika Gupta 6 years, 1 month ago

You have choice.. Make investigatory or working model..if you are making investigatory then no file is required

1Thank You

Manika Gupta 6 years, 1 month ago

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Akankshya Pattnaik 6 years, 1 month ago

Yes

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ANSWER

Imp topic of ac chapter?

Posted by Mannat Kaur Khalsa? 6 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Akankshya Pattnaik 6 years, 1 month ago

Lcr circuit Transformer

3Thank You

ANSWER

An object has an image thrice of its original size when kept at 8 cm and 16 cm from a convex lens .focal length of the lens is

Posted by Aadhya Yadav 6 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Write the short note on periyar

Posted by Prashant Bhourgade 6 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

State bohrs quantum condition in connection with the hydrogen atom. What is the value of bohrs radius in SI system

Posted by Dhiraj Paswan 6 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

During any radiation the new element is form . Which also want to became stable so it also emit radiation . Then radiation of new element also support in total radiation ?

Posted by Kanchan Yadav 6 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Is moving coil galvanometer there in the syllabus??

Posted by Priya Sharma 6 years, 1 month ago

CBSE > Class 12 > Physics

5 answers

Priya Sharma 6 years, 1 month ago

Ok Thanks

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Kapil Chauhan 6 years, 1 month ago

Yes

1Thank You

Yash Sharma 6 years, 1 month ago

Yes!!

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Peter Parker 6 years, 1 month ago

Coil ka pata nahi moving heart ka pata hai

1Thank You

Rocky Rajput 6 years, 1 month ago

Yes dear

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ANSWER

State the law of radioactive decay

Posted by Riya Jaiswal 6 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Yuvraj Singh 6 years, 1 month ago

Law of radioactive decay states that the number of nuclei undergoing decay per unit time is ∝to total number of nuclei in the sample. ... That means the number of uranium nuclei will gradually keep on decreasing with time.

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ANSWER

Which is Best..book for..board exams for physics?

Posted by Mannat Kaur Khalsa? 6 years, 1 month ago

CBSE > Class 12 > Physics

28 answers

Mannat Kaur Khalsa? 6 years, 1 month ago

Gd nytt?

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Řøhăň Řąjpůť ✌️✊ 6 years, 1 month ago

thik hai gud n8 ?

1Thank You

Mannat Kaur Khalsa? 6 years, 1 month ago

Aapne esse bola..na..isleye...

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Řøhăň Řąjpůť ✌️✊ 6 years, 1 month ago

le abb tu ho gyi serious.

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Mannat Kaur Khalsa? 6 years, 1 month ago

Mujhe kyu acha lgega...yr...?

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Řøhăň Řąjpůť ✌️✊ 6 years, 1 month ago

kaam*

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Řøhăň Řąjpůť ✌️✊ 6 years, 1 month ago

mai ek ka am krta hoon offline he ho jata hoon... fir tujhe accha lagega. ? ? ?

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Mannat Kaur Khalsa? 6 years, 1 month ago

Ab serious ho gyee?

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Řøhăň Řąjpůť ✌️✊ 6 years, 1 month ago

????

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Mannat Kaur Khalsa? 6 years, 1 month ago

Rohan ko bdi hssi ari....

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Řøhăň Řąjpůť ✌️✊ 6 years, 1 month ago

? ? ?

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Mannat Kaur Khalsa? 6 years, 1 month ago

Ok...thnx..sis...☺

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Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

pehle he mention kar rahi hoon.

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Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

arrey pgl Maine Rohan ko bola hai. ?

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Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

mujhe Jo lgta tha maine bta diya.. jitna mai janti thi

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Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

dekho aesa hai.. hr sampled paper same question contain krte hai mudda bus ye hai ke tumhara concept clear hona chahhiye. iseliye first concept clear karo fir koi bhi simple paper kr lo

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Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

acchi hai. ? but Maine use ni kri aaj tk.

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Mannat Kaur Khalsa? 6 years, 1 month ago

Kya?

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Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

chl pgl.

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Mannat Kaur Khalsa? 6 years, 1 month ago

Yr xam idea kaise ?hai

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Řøhăň Řąjpůť ✌️✊ 6 years, 1 month ago

? ? agree with me. ? ? ?

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Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

yup agree with Rohan.

1Thank You

Kapil Chauhan 6 years, 1 month ago

Ncert

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Mannat Kaur Khalsa? 6 years, 1 month ago

Rohan how was ur exam?

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Amol Gùpta 6 years, 1 month ago

I also agree with rohan ????

2Thank You

Řøhăň Řąjpůť ✌️✊ 6 years, 1 month ago

ncert + Arihant kr lena. mere hisab se best hai ✌️ baaki jitne log utni baatein. ?

2Thank You

Aman Rajput 6 years, 1 month ago

ArihNt sample paper 2008 to 2018 is best

1Thank You

Himanshu Mishra 6 years, 1 month ago

For boards ,S.L.arora.

2Thank You

ANSWER

Moving coil galvonometer

Posted by Bollywood Battle 6 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Yogita Ingle 6 years, 1 month ago

Moving Coil Galvanometer:

Moving coil galvanometer is an electromagnetic device that can measure small values of current. It is also known as Weston galvanometer.
It works on the principle that when a current loop is placed in an external magnetic field, it experiences torque, and the value of torque can be changed by changing the current in the loop
Moving coil galvanometer consists of permanent horse-shoe magnets, coil, soft iron core, pivoted spring, non-metallic frame, scale and pointer
We know that a current loop having N number of turns,and the cross sectional area A, carrying current i, when placed in and along the direction of external magnetic field B, experiences a torque given by:

ԏ = NiAB

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ANSWER

A point charge of +8micro coulomb experiencea a force of 2000 N at a point.what is the electric field intensity at that point ?

Posted by Hariom Kashyap 6 years, 1 month ago

CBSE > Class 12 > Physics