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

Dipole is simply a set of equal and opposite charges.....that's it.....as it contains pair of equal and opposite charges ,it's net charge is zero. This property of dipole indicates that when a dipole is place in a box or sphere ,the electric flux through it also becomes zero.

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a dipole is present in an electrostatic field of magnitude 10⁶ N/C . if the work done in rotating it , from its position to stabe equlibrium to its position of unstable equlibrium, equals 2*10^_23J,find the dipole moment of this dipole

Posted by Jasmeet Singh 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Parveen Esram 7 years, 4 months ago

2*10-17 /C...10 s power - 17

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Lami's theorem???

Posted by Suresh Malik 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Lekha Raj 7 years, 4 months ago

Not included in cbse syllabus

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What is hanris low

Posted by Sahil Ahmed 7 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

Lekha Raj 7 years, 4 months ago

HENRY'S LAW...........................: It's states that the partial pressure of the gas present in a solution is directly proportional to it's mole fraction. p=k.x

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Payal Verma 7 years, 4 months ago

It is a law stating that the mass of a dissolved gas in a given volume of solvent at equillibrium is proportional to the partial pressure of the gas.

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State & prove gauss law in electrostatics

Posted by ****1970 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Kashmiri Devi 7 years, 4 months ago

Gauss law ststes that the net electric flux through any closed surface enclosing charge 'q' is 1/€○ times the charge 'q' enclosed by the surface.

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Why 2 field line never cross each other at any point ??

Posted by Niharika Srivastav 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Minal Ansari 7 years, 4 months ago

Two field line never cross each other because intersection will give two direction of electric field which is impossible...

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Write an ecpression for the flux of the electric field through an area element

Posted by Mayank Rana 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Tanisha Sharma 7 years, 4 months ago

E*dS

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Why electric field lines are continuous and discontinuous?

Posted by Manpreet Kaur 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Kashmiri Devi 7 years, 4 months ago

Electric field lines cannot be discontinuous because it is the path follwed by an unit positive charge and more over the path to be discontinuous the charge have to disappear at a point and reappear at another point which is against the law of convention of charge.

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What is time dependent electromagnetic phenomenon ?

Posted by Peeush Raj 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

❓Define electric potential energy ???

Posted by Yo Yo Honey Singh ? 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Ashita Laxami 7 years, 4 months ago

It is defined as the work done in bringing any charge from infinity to a point inside electric field

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Why induced charge can never be greater than inducing charge

Posted by Leepakshi Gupta 7 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

#Cheerful Troublemaker 5 years, 2 months ago

Induced charge is smaller than inducing charge...even when there's a huge supplying of free electrons in the induced body because the already existing electrons repel fresh ones. N this repulsion is stronger than the attraction of the inducing body.

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Payal Verma 7 years, 4 months ago

If induced charge is greater than inducing charge than the law of conservatipn of charge is violated.

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How to prepare electrostatics chapter for board exam

Posted by Raj Shrivastava 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Lekha Raj 7 years, 4 months ago

Jst to wrk hrd...

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Derive Electric potential inside solid sphere

Posted by Shivang Sharma 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

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A free proton and a free electron are placed in a uniform field. Which of the two experience greater force and greayer acceleration?

Posted by Payal Verma 7 years, 4 months ago

CBSE > Class 12 > Physics

3 answers

Payal Verma 7 years, 4 months ago

Thnx

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Tannu Bhardwaj 7 years, 4 months ago

Force applied by electric field F = qE Here q and E are same for proton and electron They will experience same force

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Subham Kumar 7 years, 4 months ago

both will experience same force as they consist of same amount of charge. but as proton is heavier, its accleration will be less than that of electron.

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Calculate the mass carried by 12.5*10tothe power 18 electrons

Posted by Saksham Tiwari 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

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What is the sign of third charge to be placed between two charges so that the whole system is in equilibrium

Posted by Palvi Sharma 7 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

Shruti Singh 7 years, 4 months ago

1.if both charges are same then charge placed between them should also be of same sign ie all 3 should be either positive or negative 2.if 2side charges are of opposite signs then if we want system to be in equillibrium them we should not keep the charge in between the 2 charges

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Chetan Soni 7 years, 4 months ago

Opposite to that two charges

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When two charged conductors having different capacities and different potentials are joined together , show that there is always a loss of energy

Posted by Arindam C.I.D Officer Shil 4 years, 6 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What are magnates

Posted by Sanjit Giri 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Payal Verma 5 years, 5 months ago

A magnet is an object or a device that gives off an external magnetic field.

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Write short note on drift velocity and relaxation time and also explain how relaxation time depends on temperature?

Posted by Bhaswati Saikia 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Ashita Laxami 7 years, 4 months ago

Drift velocity is average velocity with which electrons move towards positive terminal of conductor when potential is applied across conductor. In easy words when potential is applied across conductor electron start moving towards positive end of conductor..while moving with some velocity it may strike some obstrution(positive centres)on the way so it's speed reduces to 0...then it again acquire some velocity and start moving so time it spent in acquiring velocity after coming to rest is called relaxation time. So when temp Inc electron start moving fast so in haste they strike with positive centres more often so relaxation time increases

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In square charges are arranged on four vertices like on the upper two corner -q and lower two have +q charges so how to find the net charge on q placed at centre of square....I am very confuse in direction of charges plz share any link or post any answer which can clear my doubts .....

Posted by Minal Ansari 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Ashita Laxami 7 years, 4 months ago

Look join the charges with charge at the centre.in case of negative charge ie between opposite charges there will be attractive force ie direction would be towards negative charge.but in case of positive charge ie between same charges there will be repulsion..so direction of force would be in opposite direction and in case of this question it will be towards negative charge

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A carrier wave of peak voltage 15V is used to transmit a message singal. Find the peak voltage of the modulating signal in order to havr a modulation index of 60%.

Posted by Bhima Rai 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

moving charge without acceleration in electric potential

Posted by Himanshu Mishra 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Physics is complicative or not

Posted by Tanisha Sharma 7 years, 4 months ago

CBSE > Class 12 > Physics

5 answers

Rhitika Rai 7 years, 4 months ago

sometimes

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Abhinav Kalaliya 7 years, 4 months ago

Not at all..If you think you can then go ahead...It require practice and understanding of topic only ....like other subjects

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Aman Chhillar 7 years, 4 months ago

Sometimes it appears to be

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Rishabh Sahu 7 years, 4 months ago

Physics as a subject for study and research is not complicated because the same rules are used again and again and phenomenon follow basic definitions. But physics for competitive exams like jee its study becomes complicated because of the ways to study likemany books have wrong methods of solving questions the solution and theory is complicated,many topics of exam syllabus are not explained clearly in any single book likethe topic of constraint relations , many mistakes ,the problem of attempting large number of problems in less time ,and the standard of teachers at schools and coachings ,makes it hyper difficult to study physics.

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Vaishali Yadav 5 years, 5 months ago

Not

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why tyres of air craft is made up of special type of rubber

Posted by Chiya Yadav 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Jin Kazama 7 years, 4 months ago

They are formed conductor , esme highly flameble oil hota haiv, static electricity se boom hone ki sambhavana hoti hai isliye conducting taki sara charge underground hojaye ???

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Why electrostatic electric field lines cannot be discontinous?

Posted by Kuldeep Verma 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Payal Verma 7 years, 4 months ago

Consider an electrostatic field line terminating at a point P. Enclose this point in a Gaussian surface. There is inward net flux. According to Gauss theorem this means that the Gaussian surface must enclose tje negative charge. This means the field line can terminate at P only when there is a negative charge at P. If there is no charge at P, the net flux through the Gaussian surface must be zero and the field line must emerge out pf the surface. Thus an electrostatic field line can terminate only at a charge or it must continue to infinity.

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If three capacitor are connected in series the charge on capacitor are 2 microfarad,3 microfarad, 6 microfarad through a battery of 30 volt what is total charge given by battery and potential along each

Posted by Shobhit Singh 7 years, 4 months ago

CBSE > Class 12 > Physics