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

Bandwidth is a range of frequencies within a continuous set of frequencies. It is measured in Hertz. The purpose of a communication system is to transfer information from the transmitter which is located in one place to a receiver which is usually far away from the transmitter.

0Thank You

ANSWER

An electric dipole is kept first to the left and then to the right of a negatively charged infinite plane sheet having a uniform charge density the arrows P1 and P2 show the direction of its electric dipole moment in the two cases identify for each case by the dipole is in stable or unstable equilibrium justify each answer be next the dipole is kept in a similar way as shown near an infinitely long straight wire having uniform negative linear charge density will the dipole be in equilibrium at these two positions justify your answers

Posted by Riya Sharma 6 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Harini Chinnasamy 6 years, 8 months ago

(a) p1: stable equilibrium
p2: unstable equilibrium
The electric field, on either side, is directed towards the negatively charged sheet and its magnitude is independent of the distance of the field point from the sheet. For position p1, dipole moment and electric field are parallel. For position p2, they are antiparallel.

(b) The dipole will not be in equilibrium in any of the two positions. The electric field due to an infinite straight charged wire is non- uniform (E α 1/r). Hence there will be a net non-zero force on the dipole in each case

0Thank You

Ankit Kumar Singh 6 years, 11 months ago

I don't know

0Thank You

ANSWER

What is Barrier Potential ?????

Posted by Rahul Mishra 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Yogita Ingle 6 years, 11 months ago

With the formation of pn junction, the holes from p-region diffuse into the M-region and electrons from n-region diffuse into p-region and electron hole pair combine and get annihilated. This in turn, produces potential barrier VB across the junction which opposes the further diffusion through the junction. Thus, small region forms in the vicinity of i the junction which is depleted of free charge carrier and has only immobile ions is called the depletion regions.
The potential distribution near the pn junction is known as potential barrier.

1Thank You

ANSWER

Dirive Expression of gauss law

Posted by Neeraj Mourya 5 years, 8 months ago

CBSE > Class 12 > Physics

1 answers

Yuvraj Patel 6 years, 11 months ago

We have to take first symmetry surface , let take a circle whoose electric field is q/4pi*epsilon.*r^2and then flux is EdelS(where S is surface area of circle =4pi*r^2)so total flux is q*4*pi*r^2/4pi*epsilon.r^2=q/epsilon.

1Thank You

ANSWER

When an electron and proton of same velocity enter a region of uniform magnetic field perpendiculat to them. Which will have longer time period

Posted by Manvendra Singh Rawat 6 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Pragya Gupta 6 years, 11 months ago

I thinkproton

0Thank You

Keshav Twelve Class 6 years, 11 months ago

Proton It depends on mass directly

0Thank You

ANSWER

Is the topic deviation without dispersion and dispersion without deviation is in board.plzz reply

Posted by Rajat Dhull 6 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Kalas Sahu 6 years, 11 months ago

Yes

1Thank You

Abhishek Mehta 6 years, 11 months ago

Yes there is...

0Thank You

ANSWER

Which chapters aren't important to get max. Marks in examination

Posted by Anyyyy Gfdty 6 years, 11 months ago

CBSE > Class 12 > Physics

3 answers

Kalas Sahu 6 years, 11 months ago

All

1Thank You

Rajat Dhull 6 years, 11 months ago

All

1Thank You

Anyyyy Gfdty 6 years, 11 months ago

Sorry vo aren't ki sthan pr are h

1Thank You

ANSWER

Draw a labelled diagram of step up transformer obtain the ratio of secondary to primary voltage in terms of number of turns and current into the coins.

Posted by Akanksha Roy 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Sagar Saini 6 years, 11 months ago

Fig 7.20 pg no.260 ncert & 4th para of pg no 261

0Thank You

ANSWER

Ac generator working

Posted by Urmila Devi 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Mohd Faiz 6 years, 11 months ago

Working Of A Generator : Generator is an electric generator that converts mechanical energy to electrical energy in the form of an alternating EMF or alternating current working induction when there is a relative motion between a coil and a magnetic field an electric. current or EMF is induced in the coil bounce of an AC generator an AC.

0Thank You

ANSWER

a biconvex lens madeof a transparent material of refractive index 1.25 is immersed in water of refractive index 1.33. Will the lens behave as converging lens?Give reason

Posted by Shaima Ameen 6 years, 11 months ago

CBSE > Class 12 > Physics

3 answers

Jai Sharma 6 years, 11 months ago

Behave as diverging lens when refractive index of external medium is more than that of lense then it stat behaving opposite to its nature

1Thank You

Shaima Ameen 6 years, 11 months ago

but in buk it's given as diverging lens

0Thank You

Sarthak Choudhary 6 years, 11 months ago

Yes

1Thank You

ANSWER

A rectangular

Posted by Anshul Yadav 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Yo Yo Honey Singh ? 6 years, 11 months ago

What A rectangle?can you elaborate

0Thank You

ANSWER

Find the ratio of minimum to maximum wavelength of radiation emitted by an electron in the ground state of bohr's hydrogen atom

Posted by Mohit Dhamija 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

explain with the help of a diagram the formation of depletion region and barrier potential in a pn junction

Posted by Saurabh Mishra 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Suresh Kumar Awasthi 6 years, 11 months ago

Depletion layer- The layer of +charge p type semiconductor and - charge n type semiconductor form b/w the pn junction. Barrier potential- It is the potential which reaction to cross the depletion layer of pn junction.

1Thank You

ANSWER

If two material will the emitted electron have greater kinetic energy for incident radiation of the same frequency? What is the reason . Such m1 and m2 in which slope will be greaterfor m2.

Posted by Amit Maurya 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What is the de-Broglie wavelength associated with an electron through a potential difference of 100 volts?

Posted by Shivani Kumawat 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Navya Mitra 6 years, 11 months ago

1.227 angstrom

1Thank You

ANSWER

Describe about capacitance.All used formulas also?

Posted by Saurav Kumar 6 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Pragya Gupta 6 years, 11 months ago

C=q/V

1Thank You

Ashish Sharma 6 years, 11 months ago

Capacitance is described as the measure of the degree of storage of charge to raise the potential through one unit

1Thank You

ANSWER

With a proper diagram, explain the movement of charge carriers through different parts of the transistor and hence show that IE =Ib +Ic

Posted by Harmanpreet Bhatti 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Self inductance and it's working

Posted by Anikesh Kumar 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Suresh Kumar Awasthi 6 years, 11 months ago

When we change the current in a coil than induce current is generate in the same coil is called self inductance. Working- It oppose the growth or decay of the current flowing through the coil by inducing induce current in itself.

2Thank You

ANSWER

Is preparation of physics is better with oswal chapter wise topicwise

Posted by Rahul Das 6 years, 11 months ago

CBSE > Class 12 > Physics