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Kamal Pandey 6 years, 11 months ago

Ch 4 ,7 ,9,3

ANSWER

How is the working of cyclotron??

Posted by Jyoti Gupta 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Pragya Gupta 6 years, 11 months ago

Cyclotron is device which use to acclrrat the charge particle int the magnetic feild charge heavy partilcle alpha , gama rays ...diagram is shown by yhe two D shape dees are placed parellel to each othr and set a target outside thi range aftr getting mor energy it comrs out frm windohit yhe targe

ANSWER

What is shunt in magnetism

Posted by ???? Malik 6 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Pragya Gupta 6 years, 11 months ago

Shunt is resistor which set in the circut series get change in voltmeter and low shunt parell in galvaometr changr in ammete

Kamal Pandey 6 years, 11 months ago

Small resistance connected in parallel

ANSWER

How many of you applied for jee

Posted by H!Mαη$Hμ Ұαδαυ ✔️ 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

H!Mαη$Hμ Ұαδαυ ✔️ 5 years, 8 months ago

Abe o bhn ke lode teri gaand faad dunga

ANSWER

Explain about Nand Gate with their schematic diagram,working and applications

Posted by Lucky Singh 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Pragya Gupta 6 years, 11 months ago

I cant show diagram of

ANSWER

What is important topics to cover one day before pre board??

Posted by Abbas Shabbar 6 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Ash Thunderbird ✔ 6 years, 11 months ago

Ch 15 - Definitions, Sky/Ground/Space wave, Modulation Ch 14 - Fabrication, intrinsic and extrinsic SC, Logic Gates, p-n junction, solar cell Ch 13 - Binding Energy, Fission/Fusion, Decay Ch 12 - Energy Level Diagram Ch 11 - Photoelectric Effect, Einstein's PE equation Ch 10 - YDSE, Malus Law, Wavefront, Huygens Principle, Law of Refraction Ch 9 - Mostly numericals or reasoning questions are asked Ch 8 - EM spectrum Study these topics only, you'll pass and take this as a lesson for boards! All The Best! ?

Shweta Papnai 6 years, 11 months ago

Just chill ??

ANSWER

what are the important topics from the chap "atoms"??probably expected in exams.....

Posted by Pallu Kumar 6 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Pallu Kumar 6 years, 11 months ago

hope so...and what about nuclei? are both of them carries equal weightage......

Ash Thunderbird ✔ 6 years, 11 months ago

To be honest, only Energy Level Diagram is important in this chapter. Most years questions didn't even came from this chapter! :(

ANSWER

Why modulation is necessary ?

Posted by Chakshu Sharma 2204 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Navya Singh 6 years, 11 months ago

To increase the range nd power of the signal

4Thank You

ANSWER

What are universal gates ?

Posted by Navya Singh 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Kamal Pandey 6 years, 11 months ago

Those gates which can be used as and,or,not,nand,nor gate.

ANSWER

Why are logic gates called so ?

Posted by Navya Singh 6 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Ash Thunderbird ✔ 6 years, 11 months ago

Logic Gates are called so as they are basically a digital circuit that follows a certain logical relationship between the given input and the recieved output. (I was just solving questions from this topic :D)

Khagendra Shrivas 6 years, 11 months ago

It has one output but one or more input.

ANSWER

Derive shell's law on the basis of Huygens's wave theory when light is traveling from a denser to a rarer medium

Posted by Rachana Rawat 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Two points charges 4miue C ,-2miueC are separated by a distance of 1m in air .at what point on the line joining the charges is the electric potential zero?

Posted by Ayush Kr 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

PROJECT

Posted by Ankit Kumar 5 years, 8 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Give expression for reactance of an inductance and a capacitance.

Posted by Anup Vishwa 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What is the difference b/w thin parallel plate capacior and thin parallel plate capacitor ?

Posted by Ashish Bhati 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Anubha Sinha 6 years, 11 months ago

The letter 't'

ANSWER

Why value of 'k' becomes infinite if we replaced dielectric slab with a conducting slab ?

Posted by Ashish Bhati 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Potential drop formula

Posted by Mayank Sharma 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What does the negative sign indicates in E = -dV/dl ?

Posted by Ashish Bhati 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Parag Bentiya 6 years, 11 months ago

It represents decrease/reduction.

ANSWER

Why potential inside a conductor is constant?

Posted by Ashish Bhati 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Amit Gupta 6 years, 11 months ago

Because inside a conductor electric field is zero

ANSWER

Definition of dielectric constant

Posted by Aditya Sharma 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Yogita Ingle 6 years, 11 months ago

Dielectric constant of the medium is the ratio of the electrostatic force of interaction between two given point charges held certain distance apart in vacuum/air to the force of interaction between the same two charges held the same distance apart in the material medium.
F₀/F_m = ε/ε₀ = K ……(from Coloumb’s law).
Physical significance of dielectric constant is the resistivity to stop the current or conduct electricity through material but induces charge on it in electrostatic.

ANSWER

b) verify Snell's low

Posted by Rama Kurre 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

a) A plane wavefront approaches a plane surface separating two media. If medium 1is optically denser then medium 2 is optically rarer using huygen's principle explain and show that how the refracted wavefront is constructed?

Posted by Rama Kurre 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What is the force on the dipole pleased in uniform magnetic field

Posted by Abhishek Panthri 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Difficulty level of physics papaer this year

Posted by Kushal Dobhal 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What is the function of photodiode

Posted by Rider Vivek 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Yogita Ingle 6 years, 11 months ago

It is operated under reverse bias below the breakdown voltage
When photodiode is illuminated with light (photons) , with energy hט greater than the energy gap of the semiconductor, the electron-hole pairs are generated due to the absorption of photons, in or near the depletion region of the diode
Due to electric field at the junction, electrons and holes are separated before they combine
The direction of electric field is such that the electrons reach n-side and the holes reach the p-side
The movement of electrons and holes gives rise to emf
When external load is connected, current flows. The magnitude of the photocurrent depends on the intensity of incident light
In reverse bias, we can observe that as intensity increases, the current also increases