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

Because it is the one of the characteristic of equipotential surfure value of work done in equipotential surfuce is zero because the theta is 90 and cos 90= 0

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Lense maker formulla

Posted by Sunit Singh 5 years, 7 months ago

CBSE > Class 12 > Physics

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Capacitance of parallel plate capacitor when a dielectric slab of constant K is introduced between the plates of capacitor??????

Posted by Kriti Sharma 5 years, 7 months ago

CBSE > Class 12 > Physics

2 answers

Rajat Naik 5 years, 7 months ago

C = KAabsolnot/d

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Surya Singh 5 years, 7 months ago

K times of capacitance in vaccum if dielectric is completely filled

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Briefly explain the principle of a capacitor and derive an expression for the capacitance of parallel plate capacitor whose plates are separated by a dielectric medium please please please answer???????

Posted by Kriti Sharma 5 years, 7 months ago

CBSE > Class 12 > Physics

2 answers

Rajat Naik 5 years, 7 months ago

C = a absolnot /d -t +t/k

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Deepak Kumar 5 years, 7 months ago

Ye derivation h...isme kese likh sakte h... and image ka option nhi h

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What do you understand by the statement 'liht from the sun is unpolarised? Explain, how does sunlight gets polarised by the process of scattering?.......Answer plaese??

Posted by Tarang Banjare? 5 years, 7 months ago

CBSE > Class 12 > Physics

3 answers

Rajat Naik 5 years, 7 months ago

Unpolarised meaning non polar light when we put the light in poloroid it converts the non polar light into polar light this process is known as polarisation where final intenaity is equal to I2=i0/2cossquare fie

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Surya Singh 5 years, 7 months ago

Light from sun is polarized means it vibrate in all plane. And it get polarized when incident on particals and observed by an angle of 90°

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Raman Verma 5 years, 7 months ago

Unpolarised means mix with many Colors......after getting scattered it remain in single form or polarized light...

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The wavelength of light from the spectral emission line of sodium is 590nm. Find the kimetic energy at which the electrond would have the samw de broglie wavelength

Posted by Sarvesh Gupta 5 years, 7 months ago

CBSE > Class 12 > Physics

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A charge rod p attracts rod R where's as p repel another charge rod Q what type of force is developed between q and r

Posted by Abhisek Shukla 5 years, 7 months ago

CBSE > Class 12 > Physics

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Questions from chapter one that your teachers put in your pre boards??????????????????????????.

Posted by Kriti Sharma 5 years, 7 months ago

CBSE > Class 12 > Physics

1 answers

.... .... 5 years, 7 months ago

Principal of superposition ,dual,atom,nuclei

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Bhai transistor se related topics like transistor as amplifier,yeh saare htt gye ?

Posted by Gunjan Mishra 5 years, 7 months ago

CBSE > Class 12 > Physics

2 answers

Rajat Naik 5 years, 7 months ago

Logic gates are also out of syallbus

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Aryaman Singh 5 years, 7 months ago

Bhai transistor pura httt gaya

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Energy diagram for conductor insulator and semiconductor?

Posted by Barath Sanjay 5 years, 7 months ago

CBSE > Class 12 > Physics

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On inserting a dilectric of dilectric constant k will there be any change in the enegy density if the original energy density is y.??

Posted by Avantika Tayal 5 years, 7 months ago

CBSE > Class 12 > Physics

1 answers

Sarthak Vats 5 years, 7 months ago

Yes... It becomes k y

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If I will Attempt All question and Write Related to the topic Asked in Question Will I Get Passed??

Posted by Kartikeyp83 Pandey 5 years, 7 months ago

CBSE > Class 12 > Physics

3 answers

Abhinav Jha 5 years, 7 months ago

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Shruti Baheti 5 years, 7 months ago

Will depend on your luck?

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Krishna Kumar 5 years, 7 months ago

How does angle of dip charge as line goes from magnetic pole to magnetic equator of the earth

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Positron

Posted by Naresh Jaglan 5 years, 7 months ago

CBSE > Class 12 > Physics

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Weightage of derivation

Posted by Aayush Garg 5 years, 7 months ago

CBSE > Class 12 > Physics

1 answers

Surya Singh 5 years, 7 months ago

Near about 12 marks

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Filter circuit in semi conductor h kya syllabus mein bhai?

Posted by Gunjan Mishra 5 years, 7 months ago

CBSE > Class 12 > Physics

1 answers

Aditya Tripathi 5 years, 7 months ago

Haaa

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Syllabus me only astronomical telescope hai kya, not others (terrestrial, reflecting,cassegrain)..???

Posted by Rajat Barwar 5 years, 7 months ago

CBSE > Class 12 > Physics

2 answers

Shreejit Jayaprasad 5 years, 7 months ago

Yes there's only astronomical telescope in syllabus.. Since cassegrain is also given in ncert it too can be asked in boards so don't take a risk and study it too

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Rajat Barwar 5 years, 7 months ago

I have done them also but confirm karna hai,last time revision ke liye??

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Important question of physics

Posted by Jt Techinical 5 years, 7 months ago

CBSE > Class 12 > Physics

4 answers

Naina20 Tiwari 5 years, 7 months ago

Rectifier (full wave and half wave),hysterisis loop , forward n reverse bais ,cyclotron, eletric field due to dipole at axial and equtorial line ,gauss therom and its application , bio - savart law ,amper circuitial law and its application ,meter bridge,potentiometer ,wheat stone bridge ac genrator ,eddy current ,lenz law , faraday law ,LCR circuit ,lens and lens maker formula ,hygens principle , einstien eq. , Davission and germer exp. ,Bohr posulates ,half life , zenor diode

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Jt Techinical 5 years, 7 months ago

Ac dynamo

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Jt Techinical 5 years, 7 months ago

Pn junction

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Jt Techinical 5 years, 7 months ago

Cyclotron kr le bro

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Imp questions bata do ..plz

Posted by Devesh Kumar 5 years, 7 months ago

CBSE > Class 12 > Physics

1 answers

Tarang Banjare? 5 years, 7 months ago

Solve sample papers or last year papers......?

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Give relationship btw the charges induced in a coil when rotated in B from o to 90

Posted by Bennita Sara Roys 5 years, 7 months ago

CBSE > Class 12 > Physics

0 answers

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Weightage of numericals?

Posted by Archit Nangla 5 years, 7 months ago

CBSE > Class 12 > Physics

3 answers

User 123 5 years, 7 months ago

How many numericals can be asked??

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Manjay Jha 5 years, 7 months ago

12 to 15 marks only

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Sheetal Sahoo 5 years, 7 months ago

around 21

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Any one from lucknow?

Posted by Pushkar Gupta 5 years, 7 months ago

CBSE > Class 12 > Physics

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When a plane wavefront is incident on a concave mirror the reflected wave front spherical shape why?

Posted by Muskaan Vig 5 years, 7 months ago

CBSE > Class 12 > Physics

4 answers

Rajat Barwar 5 years, 7 months ago

All the incident lines reflect back towards focus hence the structure perpendicular to all these are spheres with focus as centre.

2Thank You

Muskaan Vig 5 years, 7 months ago

Moving coil galvanometer..It is based on principle that when a current carrying loop is placed in magnetic field (perpendicular to its direction) it experiences torque and rotates which gives deflection.......

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Laa Tungma 5 years, 7 months ago

Moving coil galvanometer

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Nandini Tamrakar 5 years, 7 months ago

Because wavefront is the locus of all pointthat contains and perpendicular

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Sb kaise pdh rhe ho...by notes ya videos

Posted by Shalini Singh 5 years, 7 months ago

CBSE > Class 12 > Physics