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Write the condition for Total internal reflection to take place .Derive relation between critical angle and reflection index of the medium

Posted by Sneha Kashyap 4 years, 8 months ago

CBSE > Class 12 > Physics

2 answers

Drishty Kamboj 4 years, 8 months ago

Angle of i should be greater than critical angle...... Refraction should be from denser to rarer medium

Shivam Kumar 4 years, 8 months ago

Angle of incidence is greater or equal to critical angle

ANSWER

A laser operates at a frequency of 3into 10^14 Hz and has an aperture of 10^-2 m. What will be the angular spread??

Posted by Mr. Singh 4 years, 8 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Magnetic effect of current and magnetism se important topic bata do koi

Posted by Mr. Fake... 4 years, 8 months ago

CBSE > Class 12 > Physics

3 answers

Tanya ?? 4 years, 8 months ago

@tanu sharma .But cyclotron delete ho gya h .

Tanu Sharma 4 years, 8 months ago

Cyclotron is one of the most important topic...

Student Of The Year 4 years, 8 months ago

1. Biot - Savart law, 2. Ampere's law, 3. Moving coil galvanometer....... 1. Earth magnatism, 2. Electric dipole in uniform magnetic field.

ANSWER

What is coulomb's vector form and it's formula

Posted by Vinay Malik 4 years, 8 months ago

CBSE > Class 12 > Physics

2 answers

Kanishk Gupta 4 years, 8 months ago

Vector F is equal to one upon (4π€•) times of product of magnitude of two charges q1 and q2 divided by square of the distance r between the two charges into unit vector r^.

Kanishk Gupta 4 years, 8 months ago

F= 1/(4π€•)X q1.q2/r^2

ANSWER

If you have to address a small gathering inside a room, everyone can hear you at your normal voice however,if you address the same gathering in open air you have to speak loudly so that everyone can hear your voice. Why?

Posted by Supriya Chaubey 4 years, 8 months ago

CBSE > Class 12 > Physics

2 answers

Atindra Jha 4 years, 8 months ago

Yes, it happens because of the surrounding as in a closed area the sound remains there for a moment however in an open surrounding the sound gets deflected because of the presence of air over there

Ankit Kumar 4 years, 8 months ago

Gwgh

ANSWER

Electric fiels

Posted by Izaz Ahamad 4 years, 8 months ago

CBSE > Class 12 > Physics

2 answers

Tanya ?? 4 years, 8 months ago

An electric charge produces an electric field , which is a regi of space around an electrically charged particle or object in which an electric charge would feel force . The electric field exists at all pts.in space and can be observed by bringing another charge into the electric field.

Abc Dgj 4 years, 8 months ago

Write the full question

ANSWER

We use sign convention in deriving Lens and Mirror formula so why do we use the sign convention while solving questions also ???

Posted by Vaibhav Yadav 4 years, 8 months ago

CBSE > Class 12 > Physics

2 answers

Drishty Kamboj 4 years, 8 months ago

Same is my doubt

Nikita Saran 4 years, 8 months ago

So that we find the exact position of what we are finding (image, object, focal length, magnification, height of object, height of image). Sign convention helps us to be specific.

ANSWER

Automoblie ignition failure occurs in damp weather. Explain why?

Posted by Dona Vinod 4 years, 8 months ago

CBSE > Class 12 > Physics

2 answers

Dona Vinod 4 years, 8 months ago

Thank you?

Main Papa Hoon Iss Duniya Ka Papa 4 years, 8 months ago

Thats mainly because the mixture of fuel and air is not compresses in a that much homogenous manner... Due to the moisture in the air on damp weather

ANSWER

AC chp se imp parts bta do koi..?

Posted by Sonali Baral 4 years, 8 months ago

CBSE > Class 12 > Physics

1 answers

Muddabbir Hussain 4 years, 8 months ago

LC oscillations , Power factor and Transformer.

ANSWER

Ac voltage applied to a LCR resister

Posted by Punam Neupane 4 years, 8 months ago

CBSE > Class 12 > Physics

1 answers

Main Papa Hoon Iss Duniya Ka Papa 4 years, 8 months ago

Yeaah that seems cool

ANSWER

Give the definition of electromagnetic wave and general equation of electric field in electromagnetic wave

Posted by Kt Vasoh Kho 4 years, 8 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

drive an expression for electric field due to dipole at axile line

Posted by Aliya Alu 4 years, 8 months ago

CBSE > Class 12 > Physics

1 answers

Ananya Thampi 4 years, 8 months ago

E =1/4Π£0P/r3

ANSWER

Reproductive health is society can be improved by

Posted by Mahesh Sanale 4 years, 8 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

When electrons equal to avagadro number are transfered from one conductor to another a potential difference of 10^6 appear between them.calculate capacitance

Posted by Sharika Sherin 4 years, 8 months ago

CBSE > Class 12 > Physics

1 answers

Rupendra Chaudhary 4 years, 8 months ago

C=Q/V use kr lo Q=ne se pakka answer aa jyega

ANSWER

A charge q(0,0,-a) and -q(0,0,a). Find electrostatic potential at (0,0,z)and (x,y,0).

Posted by Anushka Bhaskar 4 years, 8 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

The earth takes 24 h to rotate once about its axis. How much time does the sun take to shift by 1° when viewed from the earth?

Posted by Mr. Singh 4 years, 8 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Is semiconductor still in syallbus

Posted by Rahul Kumar Kannaujiya 4 years, 8 months ago

CBSE > Class 12 > Physics

5 answers

Vaishali Sharma 4 years, 8 months ago

Yess

Mr. Singh 4 years, 8 months ago

?yesa

Saloni Kaushik 4 years, 8 months ago

Yes boi

Anshuman Malhotra 4 years, 8 months ago

Yes

Tanya ?? 4 years, 8 months ago

Yes.

ANSWER

Can anyone provide me with the blueprint of the question paper of phy?

Posted by Harshit Singh 4 years, 8 months ago

CBSE > Class 12 > Physics

1 answers

Sonali Baral 4 years, 8 months ago

Net m mil jyega... Pichle yr ka iss yr ka nhi mila syd

ANSWER

Is the radius if a lens not the double of its focal length..? Why is it so?

Posted by Drishty Kamboj 4 years, 8 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What is the distance of closest approach when a 5.0 MeV proton approaches a gold nucleus ??

Posted by Mr. Singh 4 years, 8 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Using the multimeter, identity the terminals of transistor. In brief

Posted by Tanisha Shrivastava 4 years, 8 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

A toroidal solenoid of mean radius 20cm has 4000 turns of wire wound on a ferromagnetic core of relative permeability 800 calculate the magnetic field in the core for a current of 3A passing through the coil . how does the field change,when this core is replaced by a core of Bismuth???

Posted by Kirti Sharma? 4 years, 8 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What is LCR circuit in AC current please explain

Posted by Sumit Nagoriya 4 years, 8 months ago

CBSE > Class 12 > Physics

2 answers

Rahul Mangal 4 years, 8 months ago

LCR circuit is an electrical circuit that comprises an Inductor(L), a capacitor(C) and a resistance(R) . Here LCR are connected in series die to which same amount of current flow in circuit

Dhananjay Rajput 4 years, 8 months ago

The circuit in which a inductor ,capacitor and a resistor connected in series with an AC source

ANSWER

what is eletron volt

Posted by Akhil Prajapati 4 years, 8 months ago

CBSE > Class 12 > Physics

3 answers

Ananya Thampi 4 years, 8 months ago

1.6x10^-19J

Kanishk Gupta 4 years, 8 months ago

One electron volt is defined as the energy acquired by an electron when accelerated by a potential difference on 1 volt. 1eV = 1.6 X 10^-19 joule.

Preeti Kannaujiya 4 years, 8 months ago

It is a unit of energy and is equal to 1.6×10^-19Joule.

ANSWER

Compute the magnetic dipole moment of the loop shown in figure

Posted by Madhu.P. Panigatti 4 years, 8 months ago

CBSE > Class 12 > Physics

2 answers

Mr. Singh 4 years, 8 months ago

vectorM = i vectorA VectorM =i[A2-A1] =i [π(2r)square - π(r)square] =i [4πr square - πr square] =3πr square i

Mr. Singh 4 years, 8 months ago

Figure nhi send kiya tumne to karne main thora problem hua

ANSWER

Derive the lens formula giving the relation between u, V and for a thin convex lens.

Posted by Tanmay Sharma 4 years, 8 months ago

CBSE > Class 12 > Physics

2 answers

Aditi Mishra 4 years, 8 months ago

Lens formula is deleted

Ananya Thampi 4 years, 8 months ago

1/f=1/v-1/u

ANSWER

Find the effective mass of photon if the wave length of the radiation is 3000 ampere....

Posted by Mr. Singh 4 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Sia ? 4 years, 4 months ago

Here, m=?, λ=3000Å = 3×10⁻⁷m
form E=mc², m=E/c²= (hc/λ)/c²
= h/cλ = 6.63×10⁻³⁴ / 3×10⁸×3×10⁻⁷
= 7.367×10⁻³⁶kg

ANSWER

How many electron volts make up one joule??

Posted by Mr. Singh 4 years, 8 months ago

CBSE > Class 12 > Physics

3 answers

Kanishk Gupta 4 years, 8 months ago

1 joule= 6.24x10^18eV

Mr. Singh 4 years, 8 months ago

Wrong hai

Saloni Kaushik 4 years, 8 months ago

1ev=1.6×10^19 J So, 1J=1/(1.6x10^19) ev

ANSWER

Which of the following is applied form of wheatstone bridge A) potentiometer B) voltmeter C) meter bridge D) galvanometer

Posted by Aakriti Kumari 4 years, 8 months ago

CBSE > Class 12 > Physics

3 answers

Mr. Singh 4 years, 8 months ago

Meterbridge

Devil ? 4 years, 8 months ago

Meterbridge

Preeti Yadav 4 years, 8 months ago

(C) meter bridge

ANSWER

Can potential difference can zero if resistance is zero

Posted by Ayush Sharma 4 years, 8 months ago

CBSE > Class 12 > Physics

2 answers

Kanishk Gupta 4 years, 8 months ago

Yes. It is given by the relation V=IR

Student Of The Year 4 years, 8 months ago

Yes, because V=IR. If R=0, then V=0

ANSWER

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