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What is polarity

Posted by Himanshu Dahiya 7 years, 5 months ago

2 answers

Polarity is defined as the tendency of any substance to brake down in ionic form. Example . NaCl shows polarity it gives Na+ and Cl-

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Aman Chhillar 7 years, 5 months ago

Polarity of what??

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If a train approaching a perfectly reflecting wall with velocity 36 km per hour produce sound frequency 60 Hertz if speed of sound is 330 M per second in steel air then what is the Apparent frequency heard by the tri Driver by train

Posted by Avanish Singh 7 years, 5 months ago

CBSE > Class 12 > Physics

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Four charges -Q are pl find placed at four corners of a square and a charge q is at its centre. If the system is in equilibrium the value of q is

Posted by Indra Dev 7 years, 5 months ago

CBSE > Class 12 > Physics

0 answers

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Communication system

Posted by Sandeep Gupta 7 years, 5 months ago

CBSE > Class 12 > Physics

0 answers

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Is there any change in physics plus two syllabus?

Posted by Ash Ash 7 years, 5 months ago

CBSE > Class 12 > Physics

0 answers

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What is meant by electric dipole?

Posted by Saurav Singh 7 years, 5 months ago

CBSE > Class 12 > Physics

0 answers

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Considera system of n charges q1 q2......qn with position vector r1 r2 r3 r4......rn relative to some origin o deduce the expression for the net electric field E at a point p with posotion vector rp due to this system of charges

Posted by Abhishek Kumar 7 years, 5 months ago

CBSE > Class 12 > Physics

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If a sphere having Q charge is divided into 2 equal parts and separate by distance r then what should be the charge on each sphere so that the force between them is maximum

Posted by Sagar Patil 7 years, 5 months ago

CBSE > Class 12 > Physics

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Two metallic spheres each having a mass of 0.1g are suspended from a point by the threads of length 20cm. They are equally charged and repelled each other to a distance of 24cm.what is the charge on each sphere?

Posted by Rachna Panigrahi 7 years, 5 months ago

CBSE > Class 12 > Physics

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What is axial line

Posted by Aditya Sharma 7 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Jaya Shanti 7 years, 5 months ago

An axial line is the line between two adjacent dermatomes that are not represented by immediately adjacent spinal levels. Although dermatomes are shown to be discrete segments on dermatomal maps (like in the image opposite), they are in fact not; adjacent dermatomes overlap with one another

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Current is scaler quantity not a vector quantity.why?

Posted by Yugesh Kumar 7 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Rishabh Sahu 7 years, 5 months ago

For a quantity to be a vector quantity it must 1 have magnitude ,2 have direction 3obey the Triangle Law and laws of vector addition . Current (electric current)does not obey the laws of vector addition so it is not a vector quantity.

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Two point charges repel each other with force F when placed in water with dielectric constant 81.what will the force b/w them when placed the same distance apart in air?

Posted by Kajal Malik 7 years, 5 months ago

CBSE > Class 12 > Physics

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Two wire of length one of alumonium and other of copper have same resistance which one is lighter ? Hence explain why alumnium wire are preferred for over head power cable

Posted by Vikas Yadav 7 years, 5 months ago

CBSE > Class 12 > Physics

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Relation between electric field and potential

Posted by Gaurav Chauhan 7 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Jaya Shanti 7 years, 5 months ago

Hence electric field is the negative gradient of the scalar potential. The negative sign came as a result because the potential difference is the work done per unit charge against the electrostatic force to move a charge from a to b. However, this equation is valid only for static electrostatic fields.

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What is Vandarwaal

Posted by Rohit Kumar 7 years, 5 months ago

CBSE > Class 12 > Physics

2 answers

Sanchit Varshney 7 years, 5 months ago

It is one of the weakest force of attraction

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Maninder Singh 7 years, 5 months ago

Van der Waals forces' is a general term used to define the attraction of intermolecular forces between molecules. There are two kinds of Van der Waals forces: weak London Dispersion Forces and stronger dipole-dipole forces.

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Vandarwaal

Posted by Rohit Kumar 7 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Maninder Singh 7 years, 5 months ago

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Columbus law

Posted by Sunny Sandilya 7 years, 5 months ago

CBSE > Class 12 > Physics

2 answers

Jaya Shanti 7 years, 5 months ago

a law stating that like charges repel and opposite charges attract, with a force proportional to the product of the charges and inversely proportional to the square of the distance between them.

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Maninder Singh 7 years, 5 months ago

Coulomb's law, or Coulomb's inverse-square law, is a law of physics that describes force interacting between static electrically charged particles.

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What are uses of electrostatic?

Posted by Vinod Regar 7 years, 5 months ago

CBSE > Class 12 > Physics

2 answers

Jaya Shanti 7 years, 5 months ago

Static electricity is used in pollution control by applying a static charge to dirt particles in the air and then collecting those charged particles on a plate or collector of the opposite electrical charge. Such devices are often called electrostatic precipitators.

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Praveen Raj 7 years, 5 months ago

Used in pollution control by applying static charge to dirt

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What is principal focus?

Posted by Akshay Satish 7 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Jaya Shanti 7 years, 5 months ago

principal focus, focus the point on the axis of a lens or mirror to which parallel rays of light converge or from which they appear to diverge after refraction or reflection.

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light numerical

Posted by Neeeaj Dhawan 7 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Rishabh Sahu 7 years, 5 months ago

Please describe in detail your question. Are you asking for a numerical question on the topic light for practice purpose?

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Q-show that the forces between two point charges change if the dielectric constant k of medium on which is kept is increased?

Posted by Sarthak Hirekhan 7 years, 5 months ago

CBSE > Class 12 > Physics

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An observer is moving with half the speed of light towards a stationary microwave source emitting waves at frequency 10 GHz .what is the frequency of the microwave measured by the observer?

Posted by Nurav Ak 7 years, 5 months ago

CBSE > Class 12 > Physics

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Poisiellies formula

Posted by Ritu Vashisth 7 years, 5 months ago

CBSE > Class 12 > Physics

0 answers

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Which u tube channel is good for understanding physics chapters ?

Posted by Saima Jain 7 years, 5 months ago

CBSE > Class 12 > Physics

2 answers

Hardik Pandya 7 years, 5 months ago

Www.examfear.com

3Thank You

Kajal Bhardwaj 7 years, 5 months ago

Physics 4 students

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How to find out no. Of isomer

Posted by Saima Jain 7 years, 5 months ago

CBSE > Class 12 > Physics

3 answers

Saima Jain 7 years, 5 months ago

Thanks kajal such a nice name dear

1Thank You

Kajal Malik 7 years, 5 months ago

By counting different no. Of carbon chains of same molecular formula

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Rishabh Sahu 7 years, 5 months ago

Including stereoisomers or structural only.

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How much positive and negative charge is there in a cup of water

Posted by Sanjeev Kumar 7 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Neha Gupta 7 years, 5 months ago

Consult physics book part1 example 1.3

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Which is the best reference for +2(physics).

Posted by Vedansh Sao 7 years, 5 months ago

CBSE > Class 12 > Physics

5 answers

Razi Mohammad 7 years, 5 months ago

Oswaal question bank is the best way to score high marks

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Navya Yadav 7 years, 5 months ago

Xamidea

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Deepanshu Panchal 7 years, 5 months ago

Sl arora

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Soumya Khandal 7 years, 5 months ago

Xam idea

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Anita Verma 7 years, 5 months ago

Pardeep

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Charge is always quantised. Explain

Posted by Pulkit Diwakar 7 years, 5 months ago

CBSE > Class 12 > Physics

2 answers

Sparsh Gupta 7 years, 5 months ago

It means that charge can neither take arbitiary values...it is equal to integral multiple of e.. I.e q = ne

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Rahul Sharma 7 years, 5 months ago

q=ne

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Why test charge is positive

Posted by Deepak Kaushik 7 years, 5 months ago

CBSE > Class 12 > Physics

2 answers

Jaya Shanti 7 years, 5 months ago

You can use a negative charge to test an electric field. You just have to remember that the electric field points antiparallel (opposite) to the force on the charge, rather than parallel to it (in the same direction). ... You can also use the negative charges

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Rahul Sharma 7 years, 5 months ago

No it can be taken as negative too...but in most of the books it is taken as positive for convenience...

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Explain forces between multiple charges

Posted by Ariba Lareb Shaikh 7 years, 5 months ago

CBSE > Class 12 > Physics