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Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following responses. a) If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion. b) If both Assertion and Reason are correct but the Reason is not a correct explanation of the Assertion. c) If the Assertion is correct but Reason is incorrect. d) If both the Assertion and Reason are incorrect. 1. Assertion: The coulomb force is the dominating force in the universe. Reason: The Coulomb force is weaker than the gravitational force. 2. Assertion: When bodies are charged through friction, there is a transfer of electric charge from one body to another, but no creation or destruction of charge. Reason: This follows from conservation of electric charges. 3. Assertion: The surface densities of two spherical conductors of different radii are equal. Then the electric field intensities near their surface are also equal. Reason: Surface density is equal to charge per unit area. 4. Assertion: On disturbing an electric dipole in stable equilibrium in an electric field, it returns back to its stable equilibrium orientation. Reason: A restoring torque acts on the dipole on being disturbed from its stable equilibrium. 5. Assertion: On going away from a point charge or a small electric dipole, electric field decreases at the same rate in both the cases. Reason: Electric field is inversely proportional to square of distance from the charge or an electric dipole.

    • Posted by Bhumika Agrawal 4 years ago

    CBSE > Class 12 > Physics
    • 0 answers
    ANSWER

    • Posted by Sajid Md 4 years ago

    CBSE > Class 12 > Physics
    • 1 answers

    Bhumika Agrawal 4 years ago

    Sorry

    0Thank You

    ANSWER

    • Posted by Atishay Kapoor 4 years ago

    CBSE > Class 12 > Physics
    • 1 answers

    Bhumika Agrawal 4 years ago

    Go to learnohub in YouTube. There is a roshni mam. They teach maths physics chemistry and the concept is clear. You can watch it.

    1Thank You

    ANSWER

    • Posted by Harsh Singh Harsh Singh 4 years ago

    CBSE > Class 12 > Physics
    • 3 answers

    Bhumika Agrawal 4 years ago

    It is a velocity in any reference frame

    0Thank You

    Nikhil 4 years ago

    Its a velocity in any reference frame

    0Thank You

    Aditya Prakash Ranjan 4 years ago

    Relative velocity is velocity related with others or compare with other

    0Thank You

    ANSWER

    • Posted by Satyam Lavaniya 4 years ago

    CBSE > Class 12 > Physics
    • 2 answers

    Nitesh Kumar 4 years ago

    Hello

    0Thank You

    Riya Riya 4 years ago

    The algebraic sum of changes in v in any closed loop ➿ which contains battery cell and resistor in the loop =0

    0Thank You

    ANSWER

    • Posted by Tamim Iqbal 4 years ago

    CBSE > Class 12 > Physics
    • 2 answers

    Prachi Pandey 4 years ago

    Km/s

    0Thank You

    Harsh Singh Harsh Singh 4 years ago

    K.m/S

    1Thank You

    ANSWER

    • Posted by Sapna Mahato 4 years ago

    CBSE > Class 12 > Physics
    • 1 answers

    Bhumika Agrawal 4 years ago

    T1 > T2

    1Thank You

    ANSWER

    • Posted by Navnet Kaur 3 years, 11 months ago

    CBSE > Class 12 > Physics
    • 1 answers

    Sia ? 3 years, 11 months ago

    0Thank You

    ANSWER

    • Posted by Sharif Ahmad 4 years ago

    CBSE > Class 12 > Physics
    • 1 answers

    Narottam Durga 4 years ago

    English to odia

    0Thank You

    ANSWER

    • Posted by Sharif Ahmad 3 years, 11 months ago

    CBSE > Class 12 > Physics
    • 1 answers

    Sia ? 3 years, 11 months ago

    Bohr model, description of the structure of atoms, especially that of hydrogen, proposed (1913) by the Danish physicist Niels Bohr. The Bohr model of the atom, a radical departure from earlier, classical descriptions, was the first that incorporated quantum theory and was the predecessor of wholly quantum-mechanical models. The Bohr model and all of its successors describe the properties of atomic electrons in terms of a set of allowed (possible) values. Atoms absorb or emit radiation only when the electrons abruptly jump between allowed, or stationary, states. Direct experimental evidence for the existence of such discrete states was obtained (1914) by the German-born physicists James Franck and Gustav Hertz.

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    • Posted by Tanay Sahu 4 years ago

    CBSE > Class 12 > Physics
    • 2 answers

    Imar Laskar 4 years ago

    What is significant figure?

    0Thank You

    Sharif Ahmad 4 years ago

    Define Bhor Modle

    0Thank You

    ANSWER

    • Posted by Pooja Gupta Davmps Bagicha 4 years ago

    CBSE > Class 12 > Physics
    • 1 answers

    Nipun Chawla 4 years ago

    The potential difference for a plane surface is the work done in moving a positive charge from one point to another point on that surface. If the surface will be equipotential, then no work will be done and therefore, electric potential will be zero.

    0Thank You

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    • Posted by Satha Ankith 4 years, 1 month ago

    CBSE > Class 12 > Physics
    • 2 answers

    Adeeba Arshiya 4 years ago

    dB =u0 I dl × r /4π r³

    0Thank You

    सत्य सनातन? 4 years ago

    Vector dB=meu not ×vector dL × vector r /4pi × r cube

    0Thank You

    ANSWER

    • Posted by Learning Girl 3 years, 11 months ago

    CBSE > Class 12 > Physics
    • 1 answers

    Sia ? 3 years, 11 months ago

    The property of the material to oppose the electric current is known as resistivity.  It is inversely proportional to the drift of electrons.

    0Thank You

    ANSWER

    • Posted by Atharva Verma 4 years, 1 month ago

    CBSE > Class 12 > Physics
    • 0 answers
    ANSWER

    • Posted by Shefali Gurung 3 years, 11 months ago

    CBSE > Class 12 > Physics
    • 0 answers
    ANSWER

    • Posted by Himanshi Rajput 4 years, 1 month ago

    CBSE > Class 12 > Physics
    • 0 answers
    ANSWER

    • Posted by Dhroo Garg 4 years, 1 month ago

    CBSE > Class 12 > Physics
    • 1 answers

    ⭐White Wolf⭐ 4 years, 1 month ago

    The surface integral of magnetic field over a closed surface is always zero

    0Thank You

    ANSWER

    • Posted by Sunny Kumar 4 years, 1 month ago

    CBSE > Class 12 > Physics
    • 1 answers

    Bhanvi Chauhan 4 years ago

    Wheatstone bridge is an arrangement of four resistance in the form of bridge which is used for measuring an unknown resistance quickly and accurately.

    0Thank You

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    • Posted by Sachin Poonia 4 years, 1 month ago

    CBSE > Class 12 > Physics
    • 1 answers

    Himanshi Rajput 4 years, 1 month ago

    8.85 *10 rays to power -12

    2Thank You

    ANSWER

    • Posted by Dhirendra Yadav 4 years, 1 month ago

    CBSE > Class 12 > Physics
    • 1 answers

    Sachin Tiwari 4 years, 1 month ago

    The resistance of given wire with the help of a meter bridge and determine also the specific resistance

    0Thank You

    ANSWER

    • Posted by Hardikpareek Pareek 4 years, 1 month ago

    CBSE > Class 12 > Physics
    • 0 answers
    ANSWER

    • Posted by Rahul Dev 4 years, 1 month ago

    CBSE > Class 12 > Physics
    • 2 answers

    Adeeba Arshiya 4 years ago

    Large amount charge can be stored in capacitor per unit voltage

    0Thank You

    Himanshi Rajput 4 years, 1 month ago

    The ability to store charge or electrical energy

    2Thank You

    ANSWER

    • Posted by Rahul Dev 4 years, 1 month ago

    CBSE > Class 12 > Physics
    • 2 answers

    Sapna Mourya 4 years, 1 month ago

    It is a device which store charge. For example battery

    0Thank You

    Raunak Chauhan 4 years, 1 month ago

    It is device that store electt charge

    0Thank You

    ANSWER

    • Posted by Vishnu Sharma 4 years, 1 month ago

    CBSE > Class 12 > Physics
    • 2 answers

    Riyaz Alam 4 years, 1 month ago

    Meeme

    2Thank You

    Bhumika Agrawal 4 years, 1 month ago

    Made by yourself

    4Thank You

    ANSWER

    • Posted by Studious Fellow 4 years, 1 month ago

    CBSE > Class 12 > Physics
    • 2 answers

    Sapna Mourya 4 years, 1 month ago

    MLT^-2

    0Thank You

    Muskan Upadhyay 4 years, 1 month ago

    Nm2

    0Thank You

    ANSWER

    • Posted by सत्य सनातन? 4 years, 1 month ago

    CBSE > Class 12 > Physics
    • 0 answers
    ANSWER

    • Posted by Himanshi Rajput 4 years, 1 month ago

    CBSE > Class 12 > Physics
    • 2 answers

    Himanshi Rajput 4 years, 1 month ago

    Thnx?

    0Thank You

    Anudeeksha Rajpoot 4 years, 1 month ago

    Moving Charges and Magnetism Class 12 Notes Chapter 4 1. The space in the surroundings of a magnet or a current-carrying conductor in which its magnetic influence can be experienced is called magnetic field. Its SI unit is Tesla (T). 2. Oersted experimentally demonstrated that the current-carrying conductor produces magnetic field around it.  When key K is closed, then deflection occurs in the compass needle and vice-versa, 3. Biot-Savart’s Law According to this law, the magnetic field due to small; current-carrying element dl at any nearby point P is given by  4. The relationship between μ0, ε0 and c is  where, c is velocity of light, ε0 is permittivity of free space and μ0 is magnetic permeability. 5. Magnetic field at the centre of a circular current-carrying conductor/coil.  6. Magnetic field at the centre of semi-circular current-carrying conductor.  7. Magnetic field at the centre of an arc of circular current-carrying conductor which subtends an angle 0 at the centre.  8. Magnetic field at any point lies on the axis of circular current-carrying conductor  9. Magnetic field due to straight current-carrying conductor at any point P at a distance r from the wire is given by  10. The following figure shows the graphical representation of variation of B with distance from straight conductor.  11. Ampere’s Circuital Law The line integral of the magnetic field B around any closed loop is equal to μ0 times the total current I threading through the loop, i.e.   Magnitude of magnetic field of a straight wire using Ampere’s law  12. Maxwell introduced the concept of displacement current.  13. Magnetic Field due to a Straight Solenoid (i) At any point inside the solenoid, B = μ0nI where, n = number of turns per unit length. (ii) At the ends of the solenoid, B = 1/2 μ0nI  14. Magnetic Field due to Toroidal Solenoid (i) Inside the toroidal solenoid, B =μ0nI, here, n =N/2πr ,N= total number of turns (ii) In the open space, interior or exterior of toroidal solenoid, B= 0

    2Thank You

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    • Posted by Akash Akash 4 years, 1 month ago

    CBSE > Class 12 > Physics
    • 4 answers

    Sachin Tiwari 4 years, 1 month ago

    Ampere

    0Thank You

    Bhanu Pratap Singh 4 years, 1 month ago

    Ampere

    0Thank You

    Hitarth Jain 4 years, 1 month ago

    Ampere

    2Thank You

    Akash Akash 4 years, 1 month ago

    Ampere or c/s

    1Thank You

    ANSWER
    U

    • Posted by Debraj Das 4 years, 1 month ago

    CBSE > Class 12 > Physics
    • 0 answers
    ANSWER

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