Factor on which the potential gradient of the potentiometer wire depend

ANSWER

Drerive an expression for potential energy of a dipole in a uniform electric field .Hence discuss the condition of its stable and unstable equilbrium

Posted by Abhishek Yadav 5 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Gaurav Seth 5 years, 2 months ago

Considera dipole with charges +q and -q placed in a uniform eletric field as shown in figure.

In unifor electric field, dipole experiences a torque τ, which is given by

τ = p×E

where p is electric dipole moment. Torque τ will tend to rotate the dipole if p is not parallel to E.

Suppose an external torque τ_ext is applied to neutalize this torque and rotates the dipole from an angle θoto θ₁

at an infinitesimal angular speed and without angular acceleration. The amount of workdon by the external torque will be given by

W =

This work is stored as the potential energy of the system.

We can then assosciate potential energy U(θ) with an inclination θ of the dipole. Inorder to choose the

reference angular position where potential Energy is considered as zero, we select θ_o as π/2 as the reference angular position.

We can then write U(θ) = pE( cos(π/2) - cosθ) = -pE cosθ = -p·E

when θ = 0 , i.e., p is aligned in the direction of E, potential energy is minimum.

when θ = π , i.e., p is aligned in the oposite direction of E, potential energy is maximum

ANSWER

A magnetic field intensity of Earth's magnetic equator is 0.4 into 10 to the power minus 4 tensor and the earth dipole moment

Posted by Harsh Yadav 5 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Gaurav Seth 5 years, 2 months ago

Given:-

Magnetic filed of the earth

Equatorial magnetic field of the earth is given by,

Where,

Therefore,

Earth's magnetic dipole moment is given by,

_____________

ANSWER

What will be the nature of electric lines of force(1) For straight current carrying conductor (2) for circular coil?

Posted by Mr. Badmash 5 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Devil ? 5 years, 2 months ago

Straight : concentric circles

ANSWER

Any question related to Kirchhoff's law

Posted by Thakur Ajab Singh 5 years, 2 months ago

CBSE > Class 12 > Physics

2 answers

Yogita Ingle 5 years, 2 months ago

Kirchhoff’s First law: Junction law

Junction Law is also known as Kirchhoff’s First Law.
It states that at the junction,sum of current entering the junction is equal to the sum of current leaving the junction.
Junction is any point in the circuit.
Consider a case where I₁ and I₂are the currententering the junction and,currentI₄ and I₅ are exiting out of the junction.
According to Kirchhoff’s law; I₁+ I₂ =I₃+ I₄+ I₅

Ayush Vishwakarma?? 5 years, 2 months ago

Why this law is important. And who invented and when

ANSWER

Kya 2,6,10and 12 chapter no reduce ho chuka h

Posted by Abhishek Kumar Yadav 5 years, 2 months ago

CBSE > Class 12 > Physics

2 answers

Vishal Rajput 5 years, 2 months ago

Sorry to say that, but cbse doesn't reduced 30% syllabus,,, they only reduced of 13 to 15%.

Gaurav Seth 5 years, 2 months ago

On July 7, HRD Minister Ramesh Pokhriyal announced a major CBSE syllabus reduction with 30% of the syllabus slashed for the year 2020-21 for classes 9 to 12 because of the reduction in classroom teaching time due to the Covid-19 pandemic and lockdown.

Deleted syllabus of CBSE Class 12 Physics

ANSWER

The electric flux through a closed gaussian surface depends upon

Posted by Chetna Bisht 5 years, 2 months ago

CBSE > Class 12 > Physics

2 answers

Gaurav Seth 5 years, 2 months ago

The electric flux through a closed Gaussian surface depends upon Net charge enclosed and permittivity of the medium

The electric flux through a closed Gaussian surface is given by:

∮E.−→ds→=q∈∮E.→ds→=q∈

Where, q is the net charge enclosed by the Gaussian and∈∈is the permittivity of the medium.

Gaurav Tiwari 5 years, 2 months ago

Yes

ANSWER

Physics me kon kon se chapter h aur Konse reduce ho chuke h

Posted by Abhishek Kumar Yadav 5 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Gaurav Seth 5 years, 2 months ago

CBSE stated in its notification that though 30% of the syllabus has been cut from the new academic year, teachers should ensure that students understand these topics so that they can use the information in connection with other topics.

Deleted syllabus of CBSE Class 12 Physics

ANSWER

Best YouTube channel of physics

Posted by Bhavika Singh 5 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Shashank Chaturvedi 5 years, 2 months ago

Physic wallah

ANSWER

Numericals kitne marks ke aate h??

Posted by Rahul Yadav 5 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Rohtash Dagar 5 years, 2 months ago

15 to 20 marks

6Thank You

ANSWER

Posted by Bharat Kumar 5 years, 2 months ago

CBSE > Class 12 > Physics

3 answers

Ayush Vishwakarma?? 5 years, 2 months ago

F= 4kq^2/r^2 and dirn is away from +ve or towards -ve charge.

Naman Pandey 5 years, 2 months ago

Nice

Shivam Verma 5 years, 2 months ago

Case 1: Let two spheres of charge +Q and -Q be separated by distance r , Now according to coulomb law F =KQ.Q /r.r Case 2: If another sphere of charge +Q is placed at mid point b/w given two spheres Now we see third sphere is at r/2 separation from both given spheres also let F1 be the force due to +Q charge (repulsive) and F2 be the force due to -Qcharge (attractive) directed along same direction By applying coulomb law calculate F1 and F2 and Fnet is given by F1 + F2.

ANSWER

Is derivation of lateral shift , composite glass slab and apparant height is in syllabus ???

Posted by Devil ? 5 years, 2 months ago

CBSE > Class 12 > Physics

2 answers

Devil ? 5 years, 2 months ago

Yes i knew this ... But about derivations is not specified .... Only written refraction of light ..

Gaurav Seth 5 years, 2 months ago

Deleted topics

ANSWER

From where I should make notes of physics?

Posted by Supriya Tiwari 5 years, 2 months ago

CBSE > Class 12 > Physics

3 answers

Rohtash Dagar 5 years, 2 months ago

Make physics notes from magnet brain go to the playlist of the channel they have completed full physics syllabus also

Aditya Mishra 5 years, 2 months ago

From toppr.com

Purnima????? Tripathi?? 5 years, 2 months ago

From merintation or Byjus app

ANSWER

How to study physics in a better way ?

Posted by Supriya Tiwari 5 years, 2 months ago

CBSE > Class 12 > Physics

2 answers

Rohtash Dagar 5 years, 2 months ago

Try to visualize it

Aditya Mishra 5 years, 2 months ago

After completing a chapter, revise notes 2times and then, solve as many as numerical questions on that chapter as much as you can!

ANSWER

What is the relationship between field and potential???

Posted by Nisha Yadav 5 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Nargis Ahmed 5 years, 2 months ago

The relation between electric field and electric potential is mathematically given by- E=-dv/dx Where, E is the electric field V is the electric potential dx is the path length

ANSWER

What is the difference between the potential energy and potential difference

Posted by Swapna Shri 5 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Nargis Ahmed 5 years, 2 months ago

Potential energy is the energy which an object has with it. Potential difference is the voltage difference between two points.

ANSWER

A point charge Q is placed at the mid point of a line joining two charges, 4q and q. If the net force on charge q is zero, then Q must be equal to:

Posted by Anchal Chaudhary 5 years, 2 months ago

CBSE > Class 12 > Physics

2 answers

Ayush Vishwakarma?? 5 years, 2 months ago

Q must be equal to q.because equal magnitude but opposite dirn.

Ishita Sharma Ishita Sharma 5 years, 2 months ago

Gddtuhccf

ANSWER

1. A point charge Q is placed at the mid point of a line joining two charges, 4q and q. If the net force on charge q is zero, then Q must be equal to: [1] a) b) c) d) 2

Posted by Anchal Chaudhary 5 years, 2 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Show all derivations in chapter 1

Posted by Pavi Nisha Nisha 5 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Aditya Mishra 5 years, 2 months ago

?❤❤❤???

ANSWER

For a parallel plate capacitor ______________ possible potential difference between the capacitor plates

Posted by Jatin Agarwal 5 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Meghna Thapar 5 years, 2 months ago

Parallel Plate Capacitors are formed by an arrangement of electrodes and insulating material or dielectric. ... When two parallel plates are connected across a battery, the plates are charged and an electric field is established between them, and this setup is known as the parallel plate capacitor. A parallel plate air core capacitor is connected across a source of constant potential difference. When a dielectric plate is introduce between the two plates, then. A . some charge from the capacitor will flow back into the source.

ANSWER

Who could be the best teacher on u tube for physics both numerical n theory?????

Posted by Vîđhî Hööđã 5 years, 2 months ago

CBSE > Class 12 > Physics

3 answers

Shreya Khati 5 years, 2 months ago

Alak pandey...

Srishti Choudhary ✍⏳ 5 years, 2 months ago

vedantu neet madeejee channel Arvind Sir

Prince Kumar 5 years, 2 months ago

Physicswalah

ANSWER

On what factors does potential gradient of potentiometre wire depends

Posted by Bhavika Singh 5 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Gaurav Seth 5 years, 2 months ago

Factor on which the potential gradient of the potentiometer wire depend

-current passing through the potentio meter wire.
-specific resistance of the material of the potentiometer wire.
-area of cross section of the wire

4Thank You

ANSWER

Who is the best YouTuber in physics?

Posted by Nargis Ahmed 5 years, 2 months ago

CBSE > Class 12 > Physics

3 answers

Shashank Chaturvedi 5 years, 2 months ago

Physicwallh alakh pandey

Shreya Khati 5 years, 2 months ago

Alak pandey ...

Nisha Yadav 5 years, 2 months ago

Alakh pandey is best for physics ???☺️☺️☺️??????

5Thank You

ANSWER

How electric potential gradient varies with the direction of electric Field

Posted by Sudhanshu Yadav 5 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Meghna Thapar 5 years, 2 months ago

In the direction of electric field the electric potential decreases. This is because electric potential is the work done against the direction of electric field. Relation between Electric Intensity and Potential Gradient. The change of electric potential with respect to distance is called potential gradient. It is denoted by dv/dx. hence, the negative of potential gradient is equal with electric field intensity.

ANSWER

Relationship of drift velocity with current?

Posted by Ayush Vishwakarma?? 5 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Mr. Badmash 5 years, 2 months ago

Let a conductor of length l area of cross section A no. of e- per unit volume n & applied P.D. is V so drift velocity become vd. No. of e- passing through conductor in 1 sec, = n × vol. of conductor = n × A. l = nAvd …..(1) Charge flows through conductor in 1 sec, q = no. of e- ×charge of e- q = neAvd …..(2) charge flows in a conductor in t sec I = ????? ? I=? ? I = ???? _? ? ? I = neAvd But W.K.T Current density ? = ? ? = neAv d ? ? = ????

ANSWER

What is mobility? And its formula.

Posted by Ayush Vishwakarma?? 5 years, 2 months ago

CBSE > Class 12 > Physics

1 answers

Mr. Badmash 5 years, 2 months ago

Mobility – The drift velocity of e- per unit E.F. is called mobility. ? = ?? ? ? = ??? ? /? ? = ?? ? Mobablity is equal to the product of specific charge ( ? ? ) and relaxatation time SI unit = m C/N sec D.F. = [M -1 T 2A]