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Power gain of a transistor is very high. Does it mean power is generated by transistor itself? Give reason

Posted by Yuthika Yadav 7 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Field cathod emission

Posted by Shivanshu Yadav 7 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

State the factors on which the refractive index of a material medium for a given wavelength depends?

Posted by Areeba Shaikh 7 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Yuthika Yadav 7 years, 10 months ago

Nature of material of lens and wavelength of light used

0Thank You

ANSWER

fhhg

Posted by Akshat Bisht 7 years, 10 months ago

CBSE > Class 12 > Physics

3 answers

Rhitika Rai 7 years, 10 months ago

Right answer good

0Thank You

Jin Kazama 7 years, 10 months ago

Or kuch

0Thank You

Jin Kazama 7 years, 10 months ago

ghhf

0Thank You

ANSWER

Communication chapter m internet,FAX, and moblie telephony syllabus m h kya??

Posted by Ritu Gupta 7 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Anshika Singh 7 years, 10 months ago

It is given in NCERT so include it in your syllabus just like Van de graff generator

0Thank You

ANSWER

Moving coil galvanometer Application

Posted by Kajal Singh 7 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Explain polarisation by scattering

Posted by Ankit Yadav 7 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Why is it necessary to transport power at high voltage?

Posted by Pooja Kaswan 7 years, 10 months ago

CBSE > Class 12 > Physics

3 answers

Jin Kazama 7 years, 10 months ago

India ki sarkar ko hmari koi chinta hi nhi hai ???

1Thank You

Vivek Saini 7 years, 10 months ago

High voltage reduce the current

2Thank You

Ayushya Singh 7 years, 10 months ago

Power is transmitted at higher voltage to reduce power losses during transmission.

5Thank You

ANSWER

Write a relation for polarization P of a dielectric material in the presence of an electric field E.

Posted by Pooja Kaswan 7 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

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two wires of same heating effect are connected first in series nd then in parallel determine the ratio of heat

Posted by Nayan Tyagi 7 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Define potential

Posted by Md Hasan 7 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Is time period of vibrating magnet in uniform magnetic field is in syllabus ?

Posted by Tanya Namdev 7 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Break down voltage

Posted by Md Ataullah 7 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Shalini Tiwari 7 years, 10 months ago

For diodes, the breakdown voltage is the minimum reverse voltage that makes the diode conduct in reverse.

2Thank You

ANSWER

Explain formula uori/2pi R^2 used in ch-8(ncert 8.2(c)part)

Posted by Ayush Balyan 7 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Why flux independent of side of the through which it is passing. .even flux= E Acos θ

Posted by Sonali Jain 7 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Jin Kazama 7 years, 10 months ago

Flux depend on what net charge is enclosed by closed surface

1Thank You

ANSWER

What are em waves

Posted by Hritik Sahu 7 years, 10 months ago

CBSE > Class 12 > Physics

4 answers

Jin Kazama 7 years, 10 months ago

What Komal say is true

1Thank You

Jin Kazama 7 years, 10 months ago

Produced by accelerating and oscillating charged particle

1Thank You

Shreya Upadhyay 7 years, 10 months ago

The waves which are produced by accelerating high energy charge particles

0Thank You

Komal Diksha 7 years, 10 months ago

Waves produced due to varying electric nd magnetic field is called em wave.

1Thank You

ANSWER

2 metal plates form a parallel plate capacitor. Distance b/w plates is d. A metal sheet of thickness d/2 and of same area is introduced b/w plates. What is ratio of capacitances in two cases?

Posted by Preeti Verma 7 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Pratyush Rawat 7 years, 10 months ago

C:C'=1:2

2Thank You

ANSWER

Write the condition under which an electron will move undeflected in the presence of crossed electric and magnetics field.

Posted by Swaraj Raj 7 years, 10 months ago

CBSE > Class 12 > Physics

2 answers

Komal Diksha 7 years, 10 months ago

In the case of velocity selector ,when force is balanced by adjusting the electric nd magnetic field.

0Thank You

Preeti Verma 7 years, 10 months ago

When electric and magnetic field are in opp. direction and the main requirement is v=E/B

0Thank You

ANSWER

How to convert nuclear masses into atomic masses (atom and nuclei)

Posted by Tehrim Rockstar 7 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Question come from previous years paper?

Posted by Sourabh Pandey 7 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Preeti Verma 7 years, 10 months ago

Surely

0Thank You

ANSWER

A photodiode is fabricated from semiconductor with a band gap of 2.8ev . can it detect the wavelength of 6000nm

Posted by Harshit Sharma 7 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Prove that mean value of ac over its full cycle is zero.?

Posted by Sumiran Chourasia 7 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Ray optice

Posted by Ayushi Narolia 7 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What is hysterises losse

Posted by Aastha Awasthi 7 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Komal Diksha 7 years, 10 months ago

Loss during magnetisation nd demagnetisation is called hysterises losss.

3Thank You

ANSWER

A charge Q is placed just outside a closed surface. What is the electric flux through the surface ?

Posted by Aryan Gupta 7 years, 10 months ago

CBSE > Class 12 > Physics

3 answers

Jin Kazama 7 years, 10 months ago

To mene kya kaha ???

1Thank You

Deepak Repswal 7 years, 10 months ago

Zero as charge is placed outside the surface not inside.

1Thank You

Jin Kazama 7 years, 10 months ago

0Thank You

ANSWER

In Young's experiment,the width of fringes obtained with light of wavelength 6000A°is 2mm . What will be the fringe width, if the entire aapartus is immersed in a liquid of refractive index 1.33? Also, explain how location of the Maxima will be affected?

Posted by Pragati Raj 7 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

How does the effective power radiated by an antenna vary with wavelength?

Posted by Pragati Raj 7 years, 10 months ago

CBSE > Class 12 > Physics

3 answers

Shalini Tiwari 7 years, 10 months ago

Oops sorry!!!!! P is directly proportional to (1/lambda) ^2

1Thank You

Shalini Tiwari 7 years, 10 months ago

P=6(D/lambda)^2, where D is diameter of reflector

1Thank You

Jin Kazama 7 years, 10 months ago

Hertz's ya Markoni ???

0Thank You

ANSWER

How does the length of a dipole antenna vary with increase of the frequency of the carrier wave?

Posted by Pragati Raj 7 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Why is ground wave transmission of signal restricted to a frequency of 1500kHz?

Posted by Pragati Raj 7 years, 10 months ago

CBSE > Class 12 > Physics

5 answers

Jin Kazama 7 years, 10 months ago

JIN KAAMA < KAZUYA MISHIMA , actually JK=KM??????

0Thank You

Jin Kazama 7 years, 10 months ago

MW is good name not mmmmmmmmmmmmwwwwwwwwwww???

0Thank You

Jin Kazama 7 years, 10 months ago

?????????

0Thank You

Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 7 years, 10 months ago

Kazuya bas kar bancho varna andar danda bhaad dunga

0Thank You

Jin Kazama 7 years, 10 months ago

Sari pragati aaj hi karega kya

1Thank You

ANSWER

A coil of 0.01H Inductance and 1π resistance is connected to 200V,50HzAC supply. Determine 1the impedance of the circuit and 2 time lag between maximum alternating voltage and current.

Posted by Pragati Raj 7 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Jin Kazama 7 years, 10 months ago

Nichle ques. ko dekh

0Thank You

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