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2 metallic wires p and q of the same material and same length but different cross section area A1 and A2 are joined together and then connected to a source of emf Find the ratio of the drift velocity of free electrons in wires P and Q if the wires are connected 1.in series and 2.in parallel

Posted by Neha Mulewa 7 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Name the radiation of EM wave which are used in studying crystal structure.

Posted by Gaurav Kumar 7 years, 11 months ago

CBSE > Class 12 > Physics

3 answers

Abhiraj Jain 7 years, 11 months ago

X-ray

Ajay Singhania 7 years, 11 months ago

X rays

Anand Mishra 7 years, 11 months ago

X-rays

ANSWER

Potentiometer experiment viva voice

Posted by Devika S 7 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Difine modulation nd demodulation

Posted by Aashna Malick 7 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Aashna Malick 7 years, 11 months ago

Thanks rohan

Ritika Yadav 7 years, 11 months ago

Phenomenon of superimposing the low frequency wave to high frequency wave is called modulation The reverse process of modulation is called demodulation l

ANSWER

Which wave has high frequency

Posted by Anand Gupta 7 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Rashi Bari 7 years, 11 months ago

Y-rays(Gamma rays) having frequency 10^18 to 10^22 Hertz

ANSWER

can two equipotencey surface intersect

Posted by Priyankya Singh 7 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Aditya Srivastava 7 years, 11 months ago

Never because at the intersection point there will be two directions which is not possible

Anchal Negi 7 years, 11 months ago

No,

ANSWER

What is powerless in ac circuit containing pure inductor?

Posted by Popin Giri 7 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What type of numericals are asked from wave optics

Posted by Gaurav Tiwari 7 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Aditya Srivastava 7 years, 11 months ago

If you go through all the numericals in ncert it would be excellent

ANSWER

CBSE I am unable to understand the underlying concepts of wave optics

Posted by Gaurav Tiwari 7 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Find magnetic field dua to a straight wire

Posted by Aditya Raj 7 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Explain the principle, construction, working and theory of a transformer

Posted by Sapna Mishra 7 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Physics

Posted by Lalit Dangi 7 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

An inflated balloon is charged by rubbing with fur. Will it stick readily to a conducting wall or to an insulating wall ? Give reason.

Posted by Divyanshu Mishra 7 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

In which directions do the electric and magnetic field vector ocillate in an em wave propagating along the x axis?

Posted by Aastha Singh 7 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Aastha Singh 7 years, 11 months ago

Thanks Bhumi

Bhumi Jain 7 years, 11 months ago

If the EM wave is plane polarized, the E vector would be in the y-direction (hence our use of the symbol Ey) and it's plane of oscillation would be the x-y plane If the EM wave is unpolarized, the E vector would not remain in one plane, but change it's direction constantly every nanosecond, always remaining perpendicular to the x-direction

ANSWER

Are additional exercise questions (Ncert) are important for CBSE board papers?

Posted by Sumit Singh Sheoran 7 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Aditya Srivastava 7 years, 11 months ago

Ncert is the best for your boards

ANSWER

What is p-n junction diode?

Posted by Ajeet Yadav 7 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Bhumi Jain 7 years, 11 months ago

A p–n junction is a boundary or interface between two types of semiconductor materials, p-type and n-type, inside a single crystal of semiconductor.

Akshay Singh 7 years, 11 months ago

It's a diode consisting of both n and p type semiconductor

ANSWER

What are logic gates?

Posted by Ajeet Yadav 7 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Chinkee Jaatrana 7 years, 11 months ago

Building blocks of elementary circuits

ANSWER

Why photodiode is is always connected in reverse bias?

Posted by Milan Dimri 7 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Bhumi Jain 7 years, 11 months ago

The only reason is, that a photodiode converts incident light to electric current more "effectively" in reverse bias condition than in forward bias.

ANSWER

Derive the law of refrection of light on the basis huygens' wave theory of light

Posted by Shubham Thakur 7 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Function of repeater in a communication system

Posted by Hemam Bidyarani 7 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Saloni Garg 7 years, 11 months ago

Repeater accept signal from transmitter, amplifies it and retransmit it to recover

ANSWER

25. (a) Draw a ray diagram of compound microscope for the final image formed at least distance of distinct vision? (b) An angular magnification of 30X is desired using an objective of focal length 1.25 cm and an eye piece of focal length 5 cm. How will you set up the compound microscope for the final image formed at least distance of distinct vision?

Posted by Rohit Thakur 7 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Lens

Posted by Gaurab Dey 7 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Why must electrostatic field be normal to the surface at every point of a charged conductor ?

Posted by Aastha Agarwal 7 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Sudhanshu Saumya 7 years, 11 months ago

It should be normal so that no work is done in moving a charged particle from one point to the other on the surface of the conductor.

ANSWER

Cutted topics

Posted by Mustajeeb Hussain 7 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Plot a graph showing the variation of photoelectric current with anode potential for two light beams of same wavelength but different intensity

Posted by Bhumika Prashar 7 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

geographic axis

Posted by Priyansh Raj 7 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Purusharth Pandey 7 years, 11 months ago

vertical axis that passes through geographical meridian

ANSWER

Explanation of depletion layer

Posted by Faheem Ahmad 7 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Fresnal distance

Posted by Raji Mm 7 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What is brewester's law and prove it.

Posted by Pranav Mishra 7 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What is photo cell

Posted by Sakhshi Raj 7 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Manoj Kumar 7 years, 11 months ago

It is a pn junction diode which absorbs light energy and converts it into electricity.

ANSWER

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