List of top Questions asked in UP Board XII

Draw (\(i - \delta\)) curve for a prism, and show angle of minimum deviation in the curve.
Explain Nuclear fusion.
Find current through the battery in the circuit shown in fig :
\includegraphics[width=0.5\linewidth]{1.png}
What is total internal reflection?
Define work-function.
Write equation of energy of photon in terms of Planck's constant (h) and wavelength (\(\lambda\)).
Write Kirchhoff's laws related to electric circuit by drawing suitable circuit diagram.
When an impurity is doped in a pure semiconductor, the conductivity of the semiconductor
Write the unit of specific resistance.
A current of 10 A is flowing in a long wire along the positive Z-axis. Find the intensity of magnetic field at a point (10 cm, 0, 0).
Write Lenz's law.
A free electron is placed in the path of a plane electromagnetic waves. The electron will start moving
A double convex lens has radius of curvature R of each surface and refractive index of its material is \(\mu = 1.5\). We have
The peak voltage in a 220 volt A.C. source is
An electron projected towards East is deflected towards North by a magnetic field. The direction of magnetic field may be
A charge q is placed at the centre of the open end of a cylindrical vessel. The flux of the electric-field through the surface of the vessel is
Same current in same direction is flowing in two parallel wire with 0.06 metre distance apart with each other. The attractive force per metre length of \(3 \times 10^{-3}\) newton is working between the two. Determine the value of current flowing in each wire.
Using monochromatic light of wavelength \(\lambda\), in Young's double slit experiment, at a point on the screen where path difference is \(\lambda\) between the two waves, the intensity of light is K units. Find the intensity of light at a point on the screen where path difference is \(\frac{\lambda}{3}\).
Elucidate the diffraction of monochromatic light by narrow slit. Determine the expression for angular width of central maximum.
Describe the atomic model of Rutherford. How did Bohr model removed its drawbacks?
Classify nuclei. By giving example of each. Write their characteristics.
A convex lens of focal length f is placed somewhere between object and screen. The distance between object and screen is x. If m be the magnification of lens, then prove that \(f = \frac{mx}{(m + 1)^2\).}
What is meant by polarization of light? Describe a method to obtain plane polarized light by reflection.
Obtain the formula for work done by an electric dipole in rotating \(\theta\) from equilibrium in a uniform electric field.
An electron in hydrogen atom is moving round the nucleus with speed \(2.2 \times 10^6\) m/s in an orbit of radius \(5 \times 10^{-11}\) meter. Find the value of equivalent electric current.