Important questions for 12th Board exam

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Long an swer type question
1.    What is electric dipole? Explain intensity of electric field due to the electric dipole at axial position.
2.    Define electric dipole moment, and explain intensity of electric field due to the electric dipole at equatorial position.
3.    Derive formula for electric field near a uniformly charged wire of infinite length with the help of Gauss’ theorem.
4.    Define Derive formula for electric field due to uniformly charged thin Spherical Shell with the help of Gauss’ theorem.
5.    Explain electric potential? Derive an expression for the electric potential at a point due to a point charge. Also write the effect of several charges on the electric potential.
6.    Explain the electric potential at a point due to electric dipole on axial position.
7.    Define capacitance of a parallel plate capacitor with dielectric slab between the plates.
8.    Define capacitance of a parallel plate capacitor without dielectric slab between the plates.
9.    Write about Drift velocity. And also give the relation between drift velocity and electric current.
10.                       Write Kirchhoff’s law for electric circuits. And also say about Wheatstone bridge with diagram.
11.                       Explain Meter Bridge with principle.
12.                       Explain Potentiometer with diagram.
13.                       What will be the magnetic field at a point on the axis of a Current carrying Circular Coil/ring?
14.                       Define Ampere’s Circuital law. And also write the applications.
15.                       Explain Magnetic field at the centre of a Current carrying Circular Coil or loop.
16.                       Write the definitions of followings
a.     Angle of dip.   b. Intensity of magnetization (I).
c.     Magnetic Intensity,     d. Magnetic Permeability.
17.                       Write the properties of Dia-Magnetic and Ferromagnetic Substances.
18.                       Define following circuits:
a.     Circuit containing Inductance and Capacitance.
b.    Circuit containing Resistance, Inductance and Capacitance in series.
19.                       Explain the principle and working of Alternating current generator (A.C. Dynamo).

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