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    • Posted by Manya Shukla 5 years, 10 months ago

    CBSE > Class 12 > Physics
    • 1 answers

    Arnav Kandari 5 years, 10 months ago

    Nahi kar raha derive.

    0Thank You

    ANSWER

    • Posted by Gargee K 5 years, 10 months ago

    CBSE > Class 12 > Physics
    • 6 answers

    Meghna Sharma 5 years, 10 months ago

    N for us, we r provided with 20 ques one mark each, it may be in the form of MCQ,fill ups, one word answer n all.

    0Thank You

    Meghna Sharma 5 years, 10 months ago

    Am from haryana

    0Thank You

    Meghna Sharma 5 years, 10 months ago

    First of all its MEGHNA

    0Thank You

    Meghna Sharma 5 years, 10 months ago

    But this time 20 one mark ques are also included so all the ques can't be on theory based so chance of numericals is increased. That's why 35 marks for numer....

    1Thank You

    Gargee K 5 years, 10 months ago

    No 35 marks is too much for numericals ..

    2Thank You

    Meghna Sharma 5 years, 10 months ago

    But what i heard is that this time 35 marks will be consumed by numericals. I concerned 3 teachers about this

    2Thank You

    ANSWER

    • Posted by Elamurugan Malathy 5 years, 10 months ago

    CBSE > Class 12 > Physics
    • 1 answers

    Yogita Ingle 5 years, 10 months ago

    Stopping potential: The minimum negative potential given to the anode of a photocell for which the photoelectric current becomes zero is called stopping potential.

    (i) The increase of frequency of incident radiation has no effect on the photoelectric current.

    (ii) The photoelectric current increases proportionally with the increase in intensity of incident radiation.

    1Thank You

    ANSWER

    • Posted by Maga Talik 5 years, 10 months ago

    CBSE > Class 12 > Physics
    • 0 answers
    ANSWER

    • Posted by Tamanna Sharma 5 years, 10 months ago

    CBSE > Class 12 > Physics
    • 1 answers

    Tamanna Sharma 5 years, 10 months ago

    ((((In YDSE))), please somebody tell me the ans of this question

    0Thank You

    ANSWER

    • Posted by Tamanna Sharma 5 years, 10 months ago

    CBSE > Class 12 > Physics
    • 0 answers
    ANSWER

    • Posted by Riya Rana 5 years, 10 months ago

    CBSE > Class 12 > Physics
    • 2 answers

    Mahi D 5 years, 10 months ago

    The light should be allowed to fall near the junction so that electron hole pairs are generated by the energy of the photons of incident light.

    1Thank You

    Mahi D 5 years, 10 months ago

    Photodiode is fabricated with a transparent window to allow light to fall on the diode.

    2Thank You

    ANSWER

    • Posted by Tamanna Sharma 5 years, 10 months ago

    CBSE > Class 12 > Physics
    • 2 answers

    Tamanna Sharma 5 years, 10 months ago

    Reason ,why it's circular in shape.

    0Thank You

    Arnav Kandari 5 years, 10 months ago

    What do you want??

    1Thank You

    ANSWER

    • Posted by Tamanna Sharma 5 years, 10 months ago

    CBSE > Class 12 > Physics
    • 3 answers

    Tamanna Sharma 5 years, 10 months ago

    But there is no condition mention in electrostatics that if field is zero then there must be nocharge is present there.

    0Thank You

    Adi Kumar 5 years, 10 months ago

    As there no electic field inside conductor so no charge would be inside the conductor.

    0Thank You

    Adi Kumar 5 years, 10 months ago

    When we apply an electric field on a conductor, an electric field is induced inside the conductor for a small time . As we know free electrons are present inside conductor. So the induced electric field moves the free electrons to the side of conductor increasing electron density on one side of conductor. As a result an opposite charge is developed on other side of conducter. Asa a result an electric field opposite to the direction of applied field is generated , so both cancel out each other.and electric field inside the conducter is zero .

    1Thank You

    ANSWER

    • Posted by Hemanshu Sharma 5 years, 10 months ago

    CBSE > Class 12 > Physics
    • 2 answers

    Riya Rana 5 years, 10 months ago

    Photodiode is also operated in reverse biasing because we can easily observe the changes in current with change in voltage. Photo diode conducts current when a light of suitable frequency is incident on it, which breaks various covalent bonds.

    0Thank You

    Riya Rana 5 years, 10 months ago

    Zener diode is operated in reverse biased and is highly doped and is also known as a voltage regulator because it passes passes heavy current and high voltage when the incoming voltage fluctuates above the breakdown voltage.

    0Thank You

    ANSWER

    • Posted by Meghna Sharma 5 years, 10 months ago

    CBSE > Class 12 > Physics
    • 5 answers

    Apoorva Rao 5 years, 10 months ago

    Yes

    1Thank You

    Riya Rana 5 years, 10 months ago

    Yess

    0Thank You

    Meghna Sharma 5 years, 10 months ago

    ??

    0Thank You

    Meghna Sharma 5 years, 10 months ago

    Sure

    0Thank You

    Jauhar Ali 5 years, 10 months ago

    Yeh

    2Thank You

    ANSWER

    • Posted by Shivangi Mishra 5 years, 10 months ago

    CBSE > Class 12 > Physics
    • 1 answers

    Prashant Mishra 5 years, 10 months ago

    Hello welll..... Y=[A1^2+A2^2+2.A1.A2cos(£)]^1/2 £=|(w1-w2)t+(k1-k2)x+(€1-€2)|

    1Thank You

    ANSWER

    • Posted by Simran Dangi 5 years, 10 months ago

    CBSE > Class 12 > Physics
    • 1 answers

    Prashant Mishra 5 years, 10 months ago

    2I in opposite sense》anticlockwise

    0Thank You

    ANSWER

    • Posted by Rajdeep Prajapati 5 years, 10 months ago

    CBSE > Class 12 > Physics
    • 2 answers

    Prashant Mishra 5 years, 10 months ago

    Bsquare by 2 mu

    0Thank You

    Prashant Mishra 5 years, 10 months ago

    B^2/2ų

    0Thank You

    ANSWER

    • Posted by Prachi Dwivedi 5 years, 10 months ago

    CBSE > Class 12 > Physics
    • 2 answers

    Aditya Chauhan 5 years, 10 months ago

    What??

    0Thank You

    Riya Rana 5 years, 10 months ago

    Oky

    0Thank You

    ANSWER

    • Posted by Sachi Pandey 5 years, 10 months ago

    CBSE > Class 12 > Physics
    • 4 answers

    Uday Mann 5 years, 10 months ago

    10 year =?

    1Thank You

    Ankita Rao 5 years, 10 months ago

    Tbh, the more u solve, the more it'll help u for the 3 and 5 markers... For 2 and 1 markers and also for the pattern (overall) try to solve all the sample question for 2020; it'll benefit u more... :) As for marks, u can easily score 45-55

    1Thank You

    Prashant Mishra 5 years, 10 months ago

    Above than 75

    1Thank You

    Rajdeep Prajapati 5 years, 10 months ago

    Less than 30

    1Thank You

    ANSWER

    • Posted by Gurbhej Singh 5 years, 10 months ago

    CBSE > Class 12 > Physics
    • 4 answers

    Tamanna Sharma 5 years, 10 months ago

    I think its ac because ( less heat loss in power supplier ~ more voltage~ adjustable with the help of transformer acc to need ~produce eddy current (do not reduce it )for more heating purpose in the coil of heater. May be, this will be the reason.

    1Thank You

    Prashant Mishra 5 years, 10 months ago

    Else can be think

    0Thank You

    Prashant Mishra 5 years, 10 months ago

    Always we measure rms value of an A.C. for comparison with D.C..... iofdc=irms ofac then same heat is produce

    0Thank You

    Muskaan Vig 5 years, 10 months ago

    D.C. current will produce more heat.

    0Thank You

    ANSWER

    • Posted by Khushi Rawat 5 years, 10 months ago

    CBSE > Class 12 > Physics
    • 2 answers

    Prashant Mishra 5 years, 10 months ago

    As the name dipole 》both pole at same so the net force on the system of charge is zero 》on the centre of mass 》by newton's first law 》no force ....no change in state of motion 》if you throw a dipole its velocity of centre of mass remains same 《no other forces are acting

    1Thank You

    Rajdeep Prajapati 5 years, 10 months ago

    Its my WhatsApp no meassge me i will send you proof

    0Thank You

    ANSWER

    • Posted by Anubhav Shukla 5 years, 10 months ago

    CBSE > Class 12 > Physics
    • 2 answers

    Hemanshu Sharma 5 years, 10 months ago

    No and also logic gates not in our syllabus

    0Thank You

    Tamanna Sharma 5 years, 10 months ago

    No

    0Thank You

    ANSWER

    • Posted by S S 5 years, 10 months ago

    CBSE > Class 12 > Physics
    • 4 answers

    Meghna Sharma 5 years, 10 months ago

    Me too want

    0Thank You

    S S 5 years, 10 months ago

    Can u pls give the website from u got the official blueprint

    1Thank You

    S S 5 years, 10 months ago

    Official?

    1Thank You

    Shivam Jain Jain 5 years, 10 months ago

    Yes

    0Thank You

    ANSWER

    • Posted by Abhishek Sah 5 years, 10 months ago

    CBSE > Class 12 > Physics
    • 2 answers

    Mahi D 5 years, 10 months ago

    Dopant for silicon are taken from grp 13 and 15 because their atomin sizes are not very different from that of grp14 .. so this will not distort the structure of the semiconductor . If elements of other groups are used ,it would not be feasible to make it and it will not behave like a semiconductor.

    2Thank You

    Tamanna Sharma 5 years, 10 months ago

    In order to make ptype and ntype semiconductor means to create donor site and acceptor site in the valance shell, reason -the basic reason to use these groups is the dopant energy level within the bandgap ,for a particular temperature these dopant 100% activate according to the relation : K/t =1/V×eta here K is boltzman constant , t is temperature in Kelvin, V is thermal voltage, eta is ideality factor. But why at high diode current eta is 1 for both Ge and Si ,that's also my query if you know about this ,then please tell me.

    2Thank You

    ANSWER

    • Posted by Abhishek Sah 5 years, 10 months ago

    CBSE > Class 12 > Physics
    • 1 answers

    Tamanna Sharma 5 years, 10 months ago

    1 : Wave picture of light doesn't have any concept of threshold frequency. 2. Time lag : electron require some time to collect energy needed in order to come out from the metal surface, it is against the experimental observation in which the emission of photo electrons starts instantaneously

    2Thank You

    ANSWER

    • Posted by Tamanna Sharma 5 years, 10 months ago

    CBSE > Class 12 > Physics
    • 2 answers

    Mahi D 5 years, 10 months ago

    It means K=C (dielectric)/ C(free space)

    1Thank You

    Mahi D 5 years, 10 months ago

    Dielectric constant of a medium is defined as the ratio of the capacitance of a capacitor with the dielectric as the medium to its capacitance with vacuum between its plates.

    1Thank You

    ANSWER

    • Posted by Ruchi Sahu 5 years, 10 months ago

    CBSE > Class 12 > Physics
    • 1 answers

    Tamanna Sharma 5 years, 10 months ago

    You can see it with animation with better understanding from YouTube channel "professor dave explain "(4:50)min duration l hope this will help you.

    0Thank You

    ANSWER

    • Posted by Muskan Sejwar 5 years, 10 months ago

    CBSE > Class 12 > Physics
    • 1 answers

    Riya Rana 5 years, 10 months ago

    At constant current flowing through a wire of constant area of cross section the potential drop across the wire is directly proportional to the length of the given wire. Hence, V=kL........and r=R(L1 / L2 -1)

    0Thank You

    ANSWER

    • Posted by Aditya Singh 5 years, 10 months ago

    CBSE > Class 12 > Physics
    • 1 answers

    Tamanna Sharma 5 years, 10 months ago

    In the capacitor the gap between the parallel plates the field lines are parallel but at the corners horizontal components cancel out and vertical components add up,in order to pull the dielectric slab into it ,due to this the parallel field lines at corner ( top and bottom) becomes curved, known as fringing effect.

    1Thank You

    ANSWER

    • Posted by S S 5 years, 10 months ago

    CBSE > Class 12 > Physics
    • 1 answers

    Tamanna Sharma 5 years, 10 months ago

    P= VIcos● ,here cos●=R/Z, for an ideal capacitor R=0 hence P = VI ×0 =0 , hence power dissipated is zero. Conceptually kabhi source capacitor ko energy transfer kar raha he or vice versa, then average power is zero

    0Thank You

    ANSWER

    • Posted by Jai Ram 5 years, 10 months ago

    CBSE > Class 12 > Physics
    • 4 answers

    Vinay Gautam 5 years, 10 months ago

    Exam idea rat dal thoda hi time h ab

    0Thank You

    Sonu Rao 5 years, 10 months ago

    Theory mat padho applications per dhyan do exam neat hai

    1Thank You

    Muskan Sejwar 5 years, 10 months ago

    Take some question which come every year and then rat lo bhai time nhi h

    0Thank You

    Virat Kohli 5 years, 10 months ago

    so jao

    2Thank You

    ANSWER

    • Posted by Akhil Rawat 5 years, 10 months ago

    CBSE > Class 12 > Physics
    • 0 answers
    ANSWER

    • Posted by Upasna Nirmalkar 5 years, 10 months ago

    CBSE > Class 12 > Physics
    • 1 answers

    Deepak Insha 5 years, 10 months ago

    B = lambda ×D÷d

    1Thank You

    ANSWER

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