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Electric current is neither scalar nor vector?so what quantity is this explain?

Posted by Rafi Zamir 6 years, 4 months ago

2 answers

Tensor quantities are those which have different values according to different planes and axis. For example inertia of rotation. Current is a scalar quantity we define it's magnitude only and direction of current is opposite to that of electrons but we never define direction of electrons so current has no definite direction. Also it is written in class 11 ncert and also in HCVerma 3rd chapter that that current is scalar

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Mayank Tiwari 6 years, 4 months ago

Tensor. These are quantities which have direction but do not follow Vector Algebra.

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a force is acting between two charged placed some distance in vacuum if a brass rod placed between these two charge charge how does the force change

Posted by Mohan Joshi 6 years, 4 months ago

CBSE > Class 12 > Physics

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Guys jst read arihant last 10 years question paper chaptetwise book for all subject board(12th) ka paper ussme se he aayega...bt usko pura accha se yaad kar lena 90% ke upper aa jayega...i secured 93.89%...all the best unko jo 2020 mai boards dene wale hai

Posted by Ashwini Kumar Mohanty 6 years, 4 months ago

CBSE > Class 12 > Physics

3 answers

Ashwini Kumar Mohanty 6 years, 4 months ago

Hey friends paper format badla hai chapter nahi

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Vivek Chauhan 6 years, 4 months ago

Actually paper format is little changed....

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Aastha Chaurasia 6 years, 4 months ago

Ya she is Ryt

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Ask questions of physics till potential

Posted by Sudarshan Sharma 6 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Rafi Zamir 6 years, 4 months ago

What is electric potential and what is the potential on a circular ring

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Net electric field intensity near the surface of metal always remains normal to surface in electostatic condition . Why?

Posted by Muskan Malik 6 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Sudarshan Sharma 6 years, 4 months ago

If it will not be normal then a component of the electric line or you can say electric field will come along the surface . Suppose ECostheta now as we know that potential difference = integral of Ecostheta. dr thus there will be a potential difference but a conductor is always equipotential and thus it will have 0 potential difference so our assumption of not taking electric field line Perpendicular to the surface of conductor was wrong this Principle is called Total normal electrostatic induction(TNEI)

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A proton is placed in uniform electric field directed along the position X-axis. In which direction will it tend to move?

Posted by Vaibhav Singh 6 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Sudarshan Sharma 6 years, 4 months ago

Positive X Axis only

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Define coulomb law

Posted by Milan Kumar Singh 6 years, 4 months ago

CBSE > Class 12 > Physics

3 answers

Alam Sadab 6 years, 4 months ago

The electrostatic force between two charges is directly proportional to the product of charges and inversely proportional to the square of distance between charges. The direction of this is in the line by which charges are joined

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Shreyash Bagde 6 years, 4 months ago

The force of attraction or repulsion between any two charges is directly proportional to the magnitude of the charges and inversely proportional to the square of the distance between them (charges).

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Nishita Yadav 6 years, 4 months ago

The magnitude of the electrostatic force of attraction or repulsion between two point charges is directly proportional to the product of the magnitudes of charges and inversely proportional to the square of the distance between them.

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Write a relation between electric field at a point and its distance from a short dipole

Posted by Mohit121 Pal 6 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Sudarshan Sharma 6 years, 4 months ago

For axial 2KP /r to the power 3 . For broad on KP/r to the power thres

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Is ray optics the part of class 12 physics syllabus 2019-2020

Posted by Ujjwal Gupta 6 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

Rahul Nehwal 6 years, 4 months ago

Yes

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Aman Singh 6 years, 4 months ago

Yes

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How much is electrostatic force stronger than the gravitational force ?

Posted by Jasmine Jasmine 6 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Hritik Kumar 6 years, 4 months ago

10power 38 times

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Net electric field inside the metal becomes zero when it is in electostatic condition. Why ?

Posted by Muskan Malik 6 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

Every Solution 6 years, 4 months ago

The free charges of metal start random motion and arrange themselves in such a way that they produced field which cancel out the external electric field thats why the net electric field inside the metal became zero

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Nishita Yadav 6 years, 4 months ago

In electrostatics free charges in a good conductor reside only on the surface and no free charges are present inside the conductor. So the field in it is caused by charges on the surface. Since charges are of the same nature and distribution is UNIFORM, the electric fields cancel each other. electrostatic fields are always perpendicular to the conductors surface. Otherwise this would produce a force on the charge carriers inside the conductor and so the field would not be static as we assume and will violate the law of electrostatics. The electrostatic field at the conductor's surface is proportional to the surface charge, i.e. does not depend on the charge carriers inside the conductor.

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In remainy chapters any internal additional topic are include?

Posted by Sagar Rana 6 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

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A charged particle is aquarium at a height h from the origin to infinite line charge with the uniform linear charge density the charge lies in the vertical plane containing a line charge if the particle is displaced slightly vertically find the time period of SHM

Posted by Kalash Sharma 6 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Omparkash Kumar 6 years, 4 months ago

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The area of parallel plates of an air capacitor is 0.20m^2 and the distance between them is 0.01m. The potential difference between it's plates is 3000V. When 0.01m thick sheet of an insulating material is placed between the plates,the potential difference decreases to 1000V . Determine :i) capacitance of capacitor before placing sheet ii) charge on each plate iii) dielectric constant iv) capacitance of capacitor after placing the dielectric and v) permittivity of the dielectric £(£o=8.85*10^-12Fm-1

Posted by Pranjal Monga 6 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Omparkash Kumar 6 years, 4 months ago

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Please upload latest sample paper based on latest syllabus

Posted by Divyanshu Singh 6 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

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if C1=3pf& C2=2pf calculate the equivalent capacitance of the given network between points A&B

Posted by Sukh Sukhdeepkour 6 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

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Derivation of concave mirror formula?

Posted by Anuj Verma 6 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

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How to calculate electric flux of a circle?

Posted by Arinjay Aggarwal 6 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Yogita Ingle 6 years, 4 months ago

Electric flux is the measure of flow of the electric field through a given area. Electric flux is proportional to the number of electric field lines going through a normally perpendicular surface.

The orientation of area element decides the amount of electric flux. Thus, the area element is a vector.
The vector associated with every area element of a closed surface is taken to be in the direction of the outward normal.
Area element vector ΔS = ΔSn̂, ΔS is magnitude of area element and n̂ is unit vectorin the direction of outward normal.
Electric flux, Δφ = EΔS = E ΔScosθ, θ is angle between E and ΔS.
Unit of electric flux is NC^-1m².
Total flux through a surface, φ ≈ Σ EΔS

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Gassus theorem

Posted by Stanzin Khenrab 6 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

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Construction of cyclotron

Posted by D K 6 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

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,Hi

Posted by Siddhartha Rastogi 6 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

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Prove that electric field lines are perpendicular to equipotential surface?

Posted by Yash Garg 6 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Prashant Dubey 6 years, 4 months ago

Consider a charge 'q' is placed at a point A on an equipotential surface where electric field intensity is E . Then , electric force on q will be- F=qE Work done to displace the charge through small amount (dr) is- dw=Fdr=qEdr=qEdrcosA. But dw=0 So, qEdrcosA=0 Here, q#0;E#0;dr#0. Hence, cosA=0 Then, A=90 It means that direction of vector E is perpendicular to the surface at any point .

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Parallel plate capacitor derivation with conducting slab and di electric

Posted by Deeksha Bhatnagar 6 years, 4 months ago

CBSE > Class 12 > Physics

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Two large parellel plane sheets have uniform charge densities plus sigma and minus sigma.determine electric field between the sheets and outside the sheets

Posted by Anurag Roy 6 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Prashant Dubey 6 years, 4 months ago

Let the two points be A and B having sigma density of charge.Then, Electric field(E) at A is 0 Electric field(E) at B=sigma / epsilon not

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What is the total charge of 75 kg electron?

Posted by Amar Dubey 6 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Sinchana Malagond 6 years, 4 months ago

Mass of 1electron=9.1×10-31kg ? =75 kg No.of electeons= 6.825×10-29 electrons Charge on 1 electron=1.6 ×10-19 C Charge on 6.815×10-29 electrons=? ans~10.92×10-48 coulomb✓✓

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Draw equipotential surface

Posted by वसीम खान 6 years, 4 months ago

CBSE > Class 12 > Physics