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

What is drift velocity ? Relation between current and drift velocity . 2. SI units of current density, conductance. Resistance. 3. Working of potentiometer? 4. What do understand by resistance of a conductor? 5. What is internal resistance and and terminal potential difference?

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ANSWER

What is electrical resonance?

Posted by Saijal Kumari 7 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

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Derivation of mirror firmula for concave mirror

Posted by Rahul Gupta 7 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Define resolving power of telescope how would it change with increase of aperature of the objective and wavelength of light

Posted by Mohd Almas 7 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

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Did you all see the teaser of 2.0

Posted by Akshat Sharma 5 years, 8 months ago

CBSE > Class 12 > Physics

5 answers

Akshat Sharma 7 years, 3 months ago

Sorry for question

0Thank You

G K 7 years, 3 months ago

U r fool?

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Princesses Kaur 7 years, 3 months ago

No i do not have time for these things

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Aryan Rajpoot 7 years, 3 months ago

Don't you know that it is not a social networking site it's a study app

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Akshat Sharma 7 years, 3 months ago

Answer please

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Why q1+q2=0

Posted by Karan Upadhyay 7 years, 3 months ago

CBSE > Class 12 > Physics

3 answers

Karan Upadhyay 7 years, 2 months ago

In electrostatics the chare is conserved

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Princesses Kaur 7 years, 3 months ago

If q1 is negative or q2 is positive then possible ????

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Rangu Praveen 5 years, 8 months ago

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Under what conditions is an electron moving through a magnetic field experiences maximum force

Posted by Mahadev S 7 years, 3 months ago

CBSE > Class 12 > Physics

4 answers

Hy Shona 7 years, 3 months ago

F=qvbsin Therefore maximum force=qvb and sin should be 1i.e.90

1Thank You

Nikhil Sachdeva 7 years, 3 months ago

90'

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Princesses Kaur 7 years, 3 months ago

Magnetic field lines and unit facter of distance is in same side

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Princesses Kaur 7 years, 3 months ago

When angle is equal to zero

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Derive expressioN for force on a conductor length l carrying current I, placed in uniform magnetic field B

Posted by Aakansha Singh 7 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

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Why the direction of current changes in alternating current after each half cycle

Posted by Prakhar Mani 7 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Nikhil Sachdeva 7 years, 3 months ago

It is defined by this def.

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ANSWER

How to we check, which of the image will be brightest?

Posted by Preeti Kumari 7 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Hy Shona 7 years, 3 months ago

Large number of rays form brightst image.

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When electron in hydrogen atom jumps from energy state ni=4 to nf=3;1;2; identify the spectral series to which the emission line belong

Posted by Priya Sharma 7 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

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If λ1 and λ2 are the wavelengths of the first members of the Lyman and Paschen series respectively, then λ1:λ2 is

Posted by Priya Sharma 7 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

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In an experiment for quantity a b c and d are measured with percentage error 1% 2% 3% and 4% respectively quantity P is calculated as follows P= a3 B2 upon cd

Posted by Ankita Tiwari 7 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

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Is there any magnet with similar poles???

Posted by Tamoghna Roy 7 years, 3 months ago

CBSE > Class 12 > Physics

2 answers

Hy Shona 7 years, 3 months ago

Is it really possible piyush? Can you all think about magnetic charge and magnetic current?I know it is not discovered but i think it can possible. And plzz i have asked two questions here .plzzzzz answer them.

1Thank You

Piyush Verma 7 years, 3 months ago

No. There can not be any magnet with similar poles but faulty polarisation can lead to a piece of metal aquiring same poles on either sides which is very short lived.

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Defination af ampere circuital law

Posted by Wasim Akram 7 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Shalini Singh 7 years, 3 months ago

This law states that the line integral of magnetic field around any close path in free space is equal to the mew not times the net current enclosed by the close loop.!!

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ANSWER

Does the charge given to ametallic sphere depend on whether it is hollow or solid? Give reason.

Posted by Jitendra Nayak 7 years, 3 months ago

CBSE > Class 12 > Physics

2 answers

Hy Shona 7 years, 3 months ago

Charge always resides on the surface and hence it does not matter that sphere is hollow or solid

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Ashish Parashar 7 years, 3 months ago

no as the charge alwys reside on the surface

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Define kirchhoffs law?

Posted by A K 7 years, 3 months ago

CBSE > Class 12 > Physics

2 answers

Ashish Parashar 7 years, 3 months ago

according to it algebric sum of all the currents meeting ata junction is zero

2Thank You

Vikas Saini 7 years, 3 months ago

Kirchhoff's current law (1st Law) states that current flowing into a node (or a junction) must be equal to current flowing out of it. This is a consequence of charge conservation. Kirchhoff's voltage law (2nd Law) states that the sum of all voltages around any closed loop in a circuit must equal zero.

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Constructions and theory of dynamo

Posted by Aniket Sharma 7 years, 3 months ago

CBSE > Class 12 > Physics