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In magnetic field due to a toroid we have to do inside ,outside ,at any point in toroid or not

Posted by Meghna Shrivastav? 6 years, 1 month ago

CBSE > Class 12 > Physics

5 answers

Meghna Shrivastav? 6 years, 1 month ago

Thanks a lot ????

Muskaan Vig 6 years, 1 month ago

We have to do for three points.....1.four points in the open space interior to the toroid in magnetic field is zero there.....2. four points inside the toroid in magnetic field is equals to . permeabilitynI.....3.four points in open space exterior to the toroid and magnetic field is zero there......

Gopal Mishra 6 years, 1 month ago

Outside. Zero

Gopal Mishra 6 years, 1 month ago

Inside B=u.nI

Meghna Shrivastav? 6 years, 1 month ago

Plz tell

ANSWER

How increase in temperature affect resistivity of metals , insulators , semiconductors

Posted by Deepika Brahmane 6 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Deepika Brahmane 6 years, 1 month ago

Tqsm

Muskaan Vig 6 years, 1 month ago

by increasing temperature in metals resistivity increases, in insulators resistivity decreases and in semiconductor it almost remain constant....

ANSWER

Is human eye (physics) in CBSE syllabus?

Posted by Function Something 6 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Muskaan Vig 6 years, 1 month ago

No it is not in our syplabus.

ANSWER

In ampere circuital law magnetic field due to an infinitely long straight current conductor is there or not

Posted by Meghna Shrivastav? 6 years, 1 month ago

CBSE > Class 12 > Physics

5 answers

Gopal Mishra 6 years, 1 month ago

B=u.Inet/2πr

Meghna Shrivastav? 6 years, 1 month ago

Ok thanks

Saurabh Sharma 6 years, 1 month ago

And it is important also

Saurabh Sharma 6 years, 1 month ago

Yes, surely it is there

Meghna Shrivastav? 6 years, 1 month ago

Plz ans

ANSWER

Expression of electric feild and potential at a point due to an electric dipole

Posted by Mohd Arshlan 6 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Explain half wave and full wave rectifier

Posted by Shalini Singh 6 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Yogita Ingle 6 years, 1 month ago

In a half-wave rectifier, one half of each a.c input cycle is rectified. When the p-n junction diode is forward biased, it gives little resistance and when it is reversing biased it provides high resistance. During one-half cycles, the diode is forward biased when the input voltage is applied and in the opposite half cycle, it is reverse biased. During alternate half cycles, the optimum result can be obtained.

Full wave rectifier circuits are used for producing an output voltage or output current which is purely DC. The main advantage of full wave rectifier over half wave rectifier is that such as the average output voltage is higher in full wave rectifier, there is less ripple produced in full wave rectifier when compared to half wave rectifier.

ANSWER

whst is important for board

Posted by Påñkåj Sâìñí 6 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Ajay Kumar 6 years, 1 month ago

Study according to syllabus.. Nothing would be difficult for ???

ANSWER

Hey guys!!?...i m having my typography exam today!!

Posted by Shivani Thakur 6 years, 1 month ago

CBSE > Class 12 > Physics

9 answers

Shivani Thakur 6 years ago

Thnq.।। Aditya?✌???☺✌?

Shivani Thakur 6 years, 1 month ago

Just one day!!!

Shivani Thakur 6 years, 1 month ago

Thnx all of uuh??...but aaj physics

Aditya Chauhan 6 years, 1 month ago

Do the post mordem of the exam in such a way that you get full marks !

Lakshya ? 6 years, 1 month ago

All the best...???

Ashish Ranjan 6 years, 1 month ago

All the ??

Priya Shyam 6 years, 1 month ago

All the best for your exam.

Amol Gùpta 6 years, 1 month ago

Good luck

Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

gud luck yrr. ✌️✌️✌️?

ANSWER

All chapters multiple choice questions

Posted by Rakesh Chaurasiya 6 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Doible slit experiment

Posted by Naveen Sharma 6 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Ray optics k important derivation?

Posted by Gunjan Mishra 6 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Karan Karolya 6 years, 1 month ago

Magnification of simple nd compound microscope, telescope, lens maker formula , angle of min. Deviation.

Nyaram Rido 6 years, 1 month ago

Ans

ANSWER

Bhai hum dummy waale h ,toh cbse revision notes is enough or not?excluding derivation ,for theory

Posted by Gunjan Mishra 6 years, 1 month ago

CBSE > Class 12 > Physics

3 answers

Gunjan Mishra 6 years, 1 month ago

Coaching waale bhai

Saurabh Sharma 6 years, 1 month ago

Dummy means

Aryan Bhavsar 6 years, 1 month ago

Bhai mai bhi dummy wala hu, bilkul enough nahi hai agar definition chahiye to usko dekh warna abhi sab padne mat beth paper likh or uska analysis kar mene yahi kiya hai abhi sab padne lagega to time khatm ho jayega or paper me kuch nhi ayega. Jee/neet alag hota hai boards se.

ANSWER

What is the passing marks in physics

Posted by Shubham Kumar 6 years, 1 month ago

CBSE > Class 12 > Physics

4 answers

Awadh Kishor 6 years, 1 month ago

23 out of 70 or 33 out of 100

Laxman Singh 6 years, 1 month ago

23 out of 70

? ? 6 years, 1 month ago

33% of 70(in theory)

Arsh Sidhu 6 years, 1 month ago

33out of 100

ANSWER

Define distance of closest approach. (Ch-atoms).

Posted by Riya Rana 6 years, 1 month ago

CBSE > Class 12 > Physics

4 answers

Riya Rana 6 years, 1 month ago

Oh okk ?

? ? 6 years, 1 month ago

Hey....here potential energy equals KE ....not force of repulsion.....typo error

Riya Rana 6 years, 1 month ago

Thnkyou ?

? ? 6 years, 1 month ago

The minimum separation between nucleus and the alpha particle when no more KE is left . At this point force of repulsion equals KE

ANSWER

What is coefficient of coupling?

Posted by Tamanna Sharma 6 years, 1 month ago

CBSE > Class 12 > Physics

5 answers

Mahi D 6 years, 1 month ago

It gives the degree or manner in which two coils get coupled together.

? ? 6 years, 1 month ago

K= √L1.L2

Tapan Pandey?? 6 years, 1 month ago

I didn't found, it till now.

Tamanna Sharma 6 years, 1 month ago

Is cbse asking question on this topic because as l found only 3 question on this in 1 mark.( sample paper)

Tapan Pandey?? 6 years, 1 month ago

The fraction of magnetic flux produced by the current in one coil that links with the other coil

ANSWER

If there is no existence of eddy current then the faraday law is applicable or not,( proven to be right).comment.

Posted by Tamanna Sharma 6 years, 1 month ago

CBSE > Class 12 > Physics

5 answers

Tamanna Sharma 6 years ago

But how any case, please tell me

Aditya Chauhan 6 years, 1 month ago

It is Right !

Shashwat Giri 6 years, 1 month ago

It is probably.

Tapan Pandey?? 6 years, 1 month ago

Sorry...but comment...... good one!!?

Tapan Pandey?? 6 years, 1 month ago

Ni pata

ANSWER

Best revision chanel for physics?

Posted by Aditya Kumar 6 years, 1 month ago

CBSE > Class 12 > Physics

3 answers

Bikash Roy 6 years, 1 month ago

Gaurav sir, vedantu channel best revision series going now

Hardik Singhaniya 6 years, 1 month ago

According to Me? best YouTube channel is Physicswallah

Tamanna Sharma 6 years, 1 month ago

Your notes, NCERT textbook and sample paper not any YouTube channel is beneficial at this time.

ANSWER

How many of you are prepared for the exam?

Posted by Ankur Maurya 6 years, 1 month ago

CBSE > Class 12 > Physics

41 answers

Ankur Maurya 6 years ago

I think the world war is over

Tapan Pandey?? 6 years, 1 month ago

Do.....

Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

nhi na bilkul nhi ????

Tapan Pandey?? 6 years, 1 month ago

Roll no.do

Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

no no I am neet aspirant. and according to me semiconductor se mostly they can ask theoretical or we can say conceptual question.

Tapan Pandey?? 6 years, 1 month ago

No

Tamanna Sharma 6 years, 1 month ago

Guys please tell me is there any possibility of numerical from semiconductor

Tamanna Sharma 6 years, 1 month ago

Oo ,l think you as a jee aspirant.

Tapan Pandey?? 6 years, 1 month ago

Aata hu ???

Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

??? aa jao.. hum bhi dekh lenge tumhe.

Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

fitjee is for jee students. not for neet

Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

nope...I am neet aspirant.

Tamanna Sharma 6 years, 1 month ago

Darshannaa are you from fitjee

Tapan Pandey?? 6 years, 1 month ago

Sirf padhai me ........

Tamanna Sharma 6 years, 1 month ago

97 vale to hara he denge bhai

Tapan Pandey?? 6 years, 1 month ago

Aata hu delhi ? le kr

Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

maine apne institute ke module se kiya hai. but sl and arihant ke questions bhi acche hai.

Tapan Pandey?? 6 years, 1 month ago

Aisa ?

Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

??? haar jaaoge..

Tamanna Sharma 6 years, 1 month ago

Vese guys tum logo ne wave optics ke conceptual + graphs kaise prepare kiye as this is my weakest topic, please suggest some idea to do this

Tapan Pandey?? 6 years, 1 month ago

Haha.....

Tapan Pandey?? 6 years, 1 month ago

???

Tamanna Sharma 6 years, 1 month ago

Guys mujhe lagta he world war 3 yahi ho jayega physics ke paper se phle

Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

hinsa nhi... hinsa nhi ??✊✊✊

Tapan Pandey?? 6 years, 1 month ago

Aur tu mujhe kabhi mil........I Will shoot you ?

Tapan Pandey?? 6 years, 1 month ago

Mujhe to sapne me bhi 97 aur vo bhi physics me kabhi ni mile ??

Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

@Rohan tu gya. tu 2 ko mil.?? tu exam dene toh ayega but examination Hall tak nhi jaa payega.

Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

pre boards aese he hote hai.. boards ke liye jitna karo kam hoga. ???. kuch chapters mind se skip aese hue...hai ke 2 baar pdhne pr bhi nhi ho raha that's why maine bola hai preparation nhi hai. ???.

Tamanna Sharma 6 years, 1 month ago

But darshannaa ye to sahi bat nahi he agar tumhari preparation ho gai he to tum accept kyo nahi kar rahi ho, aur vese bhi preperation nahi kehne se koi extra marks to nahi milte jo tum pre board me 97 score karneke bad bhi hme pagal bana rahi ho.???

Tapan Pandey?? 6 years, 1 month ago

________mat bana0????

Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

97 meri aukat 47 Lane ki bhi nhi hai majak he kar raha hai vo. ??

Tapan Pandey?? 6 years, 1 month ago

97 majak mt kr????????

Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

shanti banaye rkhe idhr udhr ki baatein na kare. ☝️☝️☝️☝️???

Tapan Pandey?? 6 years, 1 month ago

???????

Řøhăň Řąjpůť ✌️✊ 6 years, 1 month ago

vese dekh raha hoon... hindi bdi acchi boli hai. ???

Řøhăň Řąjpůť ✌️✊ 6 years, 1 month ago

anyways all of you gud luck for your exam✌️✌️.

Řøhăň Řąjpůť ✌️✊ 6 years, 1 month ago

subha subha jhooth bolte hue sharm nhi aati darshana yadav?????. pre boards mein toh tum 97 score kra tha physics mein abb bol ri hoon preparation nhi hai.. mtlb jhooth ki limit cross kr di aaj apne. ?????.. ye mtlb bhul ke mai yahi par hoon so thoda limit mein jhooth bolo ke prepare nhi hai tumhara. ???

Tamanna Sharma 6 years, 1 month ago

Me

Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

aese prshn puch kr app humko krodhit kr rahe hai. ????.. apse anurodh hai ke aese prshn na puche jaye jisse kisi manushya ko shti pahounche ??... dhanyawad.??

Manjay Jha 6 years, 1 month ago

Preparations are going on! What's about you?

Tapan Pandey?? 6 years, 1 month ago

Not prepared

ANSWER

The ratio of energies of the hydrogen atom in its first to second excited state is?

Posted by Mahi D 6 years, 1 month ago

CBSE > Class 12 > Physics

3 answers

Mahi D 6 years, 1 month ago

Why is it 9:4? First excited state means n=2 or 1?

Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

9:4

Tamanna Sharma 6 years, 1 month ago

9:4

ANSWER

Why do the electric field lines never cross each other ?

Posted by Gaurav Sharma 6 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Ankur Maurya 6 years, 1 month ago

Because at the point of intersection there would be two direction of magnetic field which is not possible

Rohit Das 6 years, 1 month ago

Because if they do so then there will be to possible direction at the point of intersection which is practically impossible.

ANSWER

How does one explain increase in resistivity of a metal with increase of temperature?

Posted by Gaurav Sharma 6 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Ankur Maurya 6 years, 1 month ago

When temperature of conductor increases there is increase in thermal energy and simultaneously thermal velocity and collisions between ions increases which results in the incresed resistivity

ANSWER

Dimension related ques. Would be ask

Posted by Lakshya Verma 6 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Tapan Pandey?? 6 years, 1 month ago

Yes

ANSWER

Why do the electrostatic field lines not form closed loop ?

Posted by Gaurav Sharma 6 years, 1 month ago

CBSE > Class 12 > Physics

5 answers

Tamanna Sharma 6 years, 1 month ago

Because they have a property that they originate from positive charge ( source) and terminate on negative charge ( sink) ..hence due to this reason they doesn't form close loop......( but if it is non conservative nature then it can also form closed loop: eg - time varrying magnetic field ?cylindrical shape conductor ?circular electric field. ( non conservative))

Ankur Maurya 6 years, 1 month ago

Because at the center of loop magnetic field lines are absent

Lakshya Verma 6 years, 1 month ago

Electric field is conservative in nature

Sarthak Vats 6 years, 1 month ago

Due to the conservative nature of elwctric lines of forces

Suraj Kumar 6 years, 1 month ago

Due to its conservative nature

ANSWER

Why does a irregular loop carrying current , in ext. magnetic field becomes circular??

Posted by Rajat Barwar 6 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Rajat Barwar 6 years, 1 month ago

But in some cases this force acts inwards also??

Tamanna Sharma 6 years, 1 month ago

Because it experience a tangential force at every dl length and hence resulting in centrifugal force which pull every dl lengths in the form of circle.

ANSWER

Wavelength of radio waves

Posted by Jaideep Gautam 6 years, 1 month ago

CBSE > Class 12 > Physics

3 answers

Bikash Roy 6 years, 1 month ago

>0.1m

Lakshya Verma 6 years, 1 month ago

GREATER THAN 0.1 m

Rajat Barwar 6 years, 1 month ago

10^(-3) to 10^ 7 m

ANSWER

Kis kis ka preparation ho gya

Posted by Shalini Singh 6 years, 1 month ago

CBSE > Class 12 > Physics

3 answers

Lakshya ? 6 years, 1 month ago

Kisi ka nhi hua ?

Tapan Pandey?? 6 years, 1 month ago

Ni ho raha?

Ankur Maurya 6 years, 1 month ago

I think nobody

ANSWER

Drive expression b/w drift velocity and relaxation time

Posted by Ruhi Khan 6 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Rajat Barwar 6 years, 1 month ago

Acceleration=eE/ m for electron. Now apply eqn. of motion, v=u+ at,solve it by putting all values,take average both sides for N electrons. You will get the result. Otherwise NCERT me given hai.

ANSWER

Which is bst youtube channel of physics...i am confused☹

Posted by Shalini Singh 6 years, 1 month ago

CBSE > Class 12 > Physics

3 answers

Tapan Pandey?? 6 years, 1 month ago

Sachin sir physics

Shalini Singh 6 years, 1 month ago

??

Gopal Mishra 6 years, 1 month ago

It,s not a time to go on youtube. You only focus on your study with your notes .. I think baba gang is best channel Pleas do self study it,s a last moment

ANSWER

Guys,. Wave optics samjh nhi a rha kya kroon??

Posted by Gopal Mishra 6 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Khuskaran Sidhu 6 years, 1 month ago

Ratta maar, ratta maar

Parul Singh 6 years, 1 month ago

Do only selected topics

ANSWER

Chupa lao?

Posted by Harsh Banger 6 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Tapan Pandey?? 6 years, 1 month ago

Lg toh raha .....?physics ka dose km karne ke liye???????

Nishant Sharma 6 years, 1 month ago

Drugs smuggle kr rha hai kya bhai!

ANSWER

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