Incorrect URL accessed!!!!

Nishu Sahu 6 years, 5 months ago

The charge on A and B is -Q

4Thank You

ANSWER

A magnetic dipole is placed in a uniform magnetic field with its axis tilted wrt its positeof stable epuilibrium. Deduce an expression for the time period of this magnetic dipole about an axis, passing through its centre and perpendicular to its plane.

Posted by Debarati Chakraborty 6 years, 5 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Difference between mass and charge

Posted by Isha Kukreja 6 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Bsc Evs 5 years, 5 months ago

Mass allways positive quantity and charge may be negative and positive charge produce a force on a point charge is know as charge

ANSWER

What is black hole?

Posted by Solanki Umang 6 years, 5 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Is 12th board 2019-20 all sets of questions have different question or have same question?

Posted by Amit Kumar 6 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Priya Dharshini ? 6 years, 5 months ago

They say its different i am not sure...

ANSWER

give a summary of the important electrostatic properties of a conductor

Posted by Kahkashan Zakir 6 years, 5 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Electrification

Posted by Atal Boipai 6 years, 5 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Why no two electric line of force can interest each other

Posted by Sirat Kaur 6 years, 5 months ago

CBSE > Class 12 > Physics

2 answers

Yogita Ingle 6 years, 5 months ago

Electric lines of force never intersect each other because at the point of intersection, two tangents can be drawn to the two lines of force. This means two direction of electric field at the point of intersection, which is not possible.

Nishu Sahu 6 years, 5 months ago

If the electric field intersect then at point of intersection the two tangent can be drawn or the two direction of the electric field can be shown which is not possible.

ANSWER

Why the AC current is more harmful than DC current for humans

Posted by Rambha Bartwal 6 years, 5 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Areavector

Posted by Mk Soren 6 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Pragati Gola 6 years, 5 months ago

A vector taken perpendicularly to the surface .

ANSWER

What is fringe

Posted by Suyash Tripathi 6 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Lavanya ❤️? 6 years, 5 months ago

Fringe is a bright or dark band caused by beams of light that are in or out of phase with one another.

ANSWER

What is separation of charges

Posted by Shivesh Kumar 6 years, 5 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What is SIunit of dipole electric.what is the effect of dielectric constant on electric force between two charge particle

Posted by Shan Mohammad Ansari 6 years, 5 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

In Coulomb's law what are the factors on which k depends

Posted by Likhitha Likhi 6 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Shan Mohammad Ansari 6 years, 5 months ago

K is depend on nature of medium

ANSWER

What is p n p transister

Posted by Sandip Tyagi 6 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Yogita Ingle 6 years, 5 months ago

A PNP transistor is obtained by sandwiching a thin block of N-type semiconductor in between two blocks of P-type semiconductor. A thin block of P-type semiconductor sandwiched in between two blocks of N-type semiconductor forms a NPN transistor. The three sections of the transistor are emitter (E), base (B) and collector (C).

The emitter region is heavily doped and its size is moderate. The emitter supplies a large number of majority carriers for the current flow. The base region is very thin and lightly doped. Base region is in between the emitter and collector region. The collector region is moderately doped and larger in size than the emitter. The collector collects the majority carriers supplied by the emitter. The emitter and collector regions cannot be interchanged.
When a transistor is connected in a circuit, the base-emitter junction is always forward biased and the base-collector junction is always reverse biased.

In the given PNP transistor circuit, the emtter-base junction is forward biased and hence, large number of holes flow from the emitter region to the base region. This causes the emitter current (IE). When the holes diffuse into the base region, only a few holes combine with electrons. The base region is very thin and lightly doped and has a low number density of electrons. Thus, a very small current flows through the base region called the base current (IB). The remaining holes reach the collector under the influence of the negative collector voltage. This produces a current in the collector region called the collector current (IC).

<div>Thus, the emitter current is the sum of the collector current and the base current.
i.e. IE=IC+IB</div>

3Thank You

ANSWER

The electrostatic force on a small sphere of charge 0.4micro coloumb due to another small sphere of charge -0.8micro coloumb in air is 0.2N. (1) What is the distance between spheres? (2) What is the force on second sphere due to first ?

Posted by Someone ?? 6 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Rohit Jaiswal 6 years, 5 months ago

12cm

ANSWER

Show that the mechanical energy of a freely falling body is conserved?

Posted by Rohit Sharma 6 years, 5 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

three point charges of +2uc, -3uc and -3uc are kept at the vertices a,b,c respectively of an equilateral triangle . what should be the sign and magnitude of charge to be placed at the midpoint m of side bc so that charge at a remains in equilibrium

Posted by Aishwarya Rajesh 6 years, 5 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Two charges q1 and q2 placed at a separation of force of 12N.If the separation is changed to d',the force becomes 3N. What's the value of d' in the terms of d?

Posted by Someone ?? 6 years, 5 months ago

CBSE > Class 12 > Physics

2 answers

Someone ?? 6 years, 5 months ago

Thnk u so much

Mahak Agrawal 5 years, 5 months ago

here we have two charges Q1 and Q2 which is separated by a force of 12N With distance D according to coloumb law here we will get our equation 1st. Now when the Same charges separated by distanceD’ Then the force becomes 3N Again with the use of coloumb law Here we have our second equation. Putting both the equation in ratio we will get 3d=d’ and here is the Value ofd’ in term of d? Give reply how’s the explanation?

3Thank You

ANSWER

how to claculate max. or min. force of repultion between two charges

Posted by Yakshi Baliyan 6 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Mahak Agrawal 6 years, 5 months ago

Like charges repel each other so The force of repulsion is inversely proportional to the distance maximum the distance so minimum the force of repulsion and minimum the distance the maximum is the force of repulsion.?

ANSWER

Properties of electric field

Posted by Brijesh Choubey 6 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Gursharn Kaur 6 years, 5 months ago

Electric field is space around charges in which gorce of attraction or force if repulsion can be felt around charges A tangent drawn at a point at electric field gives the direction of the electric field

ANSWER

Two point charges q1 and q2are3cm apart and their combined charge is 20micro coulomb . If one reples other with force of 0.075N . What are two charges

Posted by Gaurav Singh 6 years, 5 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

2nd application of gauss's law

Posted by Nishank Kundan 6 years, 5 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

what is coulomb law

Posted by Anmol Sandhu 6 years, 5 months ago

CBSE > Class 12 > Physics

3 answers

Aman Kumar 6 years, 5 months ago

F=Kq1q2/r^2......its about the force the acts blw the charges...

Yogita Ingle 6 years, 5 months ago

F = kQ₁Q₂/ r²

Yogita Ingle 6 years, 5 months ago

Coulomb's law states that the magnitude of the electrostatic force between two point charges is directly proportional to the product of the magnitudes of the charges and inversely proportional to the square of the distance between them.

The proportionality constant <nobr aria-hidden="true">k </nobr>is called the electrostatic constant and has the value: <nobr aria-hidden="true">9,0 × 10⁹ N⋅m²⋅C⁻²</nobr>in free space.

ANSWER

No two electric lines of force can intersect each other? Why

Posted by Rajat Rathi 6 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Rajat Rathi 6 years, 5 months ago

Two electric lines of force never intersect Each Other because if they intersect than at the point of intersection there will be two tangents which is not possible as the two tangent represent to direction for electric field lines

ANSWER

what is the importance of coulomb's law in vector form???

Posted by Yakshi Baliyan 6 years, 5 months ago

CBSE > Class 12 > Physics

2 answers

Kumar Divij 6 years, 5 months ago

It is a electrostatic force acting between two charges q1and q2 is directly proportional to product of the charges and inversely proportional to the square of distance r between them.

Yogita Ingle 6 years, 5 months ago

The Coulomb’s Law states that the electrostatic force acting between two charges q₁ and q₂ is directly proportional to the product of the charges and inversely proportional to the distance ‘r’ between them. Coulombs law in vector form is important as it specifies direction also.

ANSWER

What are the gates

Posted by Harsh Mahajan 6 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Yogita Ingle 6 years, 5 months ago

In digital electronics, we consider only two values of voltage – high represented as 1 and low represented as 0
Logical gates are electronic circuits
Just as a gate controls the flow of vehicles, the logical gates controls the flow of information based on the logical relations. Only if the logical relations are satisfied, the digital circuit allows the signal to pass through
The logic gates are the basic building blocks of digital electronics.
We can say logic gate is a digital circuit which follows a logical relationship between the input and output
Some of the basic types of logical gate are – NOT, OR, AND, NOR and NAND. Every gate has a single or multiple input and output
Every gate is represented by a symbol