List of top Questions asked in UP Board XII

Describe a series L, C, R resonant circuit.
Energy of electron in the \(n\)th orbit of hydrogen atom is \( E_n = \frac{-13.6}{n^2} \, \text{eV} \). Draw the energy level diagram for hydrogen atom and show the transition for lines of Balmer and Paschen series.
Explain the meaning of polarisation of light and show the difference between polarised and unpolarised light with the help of a suitable diagram.
State and prove Ampere's circuital law.
In a single-slit diffraction pattern, the angle of diffraction for the second minimum is $60^\circ$. Find the width of the slit in terms of $\lambda$.
Write the unit of electric flux.
Self-inductance of a coil is 6 mH and the rate of flow of current in it is $10^3$ A/s. Find the induced emf produced in the coil.
Mention the major drawbacks of Rutherford's atomic model.
Prism angle of a prism is $A$ and angle of minimum deviation is equal to prism angle. Refractive index of the material of prism will be:
In electromagnetic waves, phase difference between electric and magnetic field vectors is:
To measure potential difference from a galvanometer, we connect in it:
Threshold wavelength for a metal surface is 2000 \AA. On incidence of radiation of 1000 \AA, the kinetic energy of emitted photoelectrons will be
The unit of magnetic dipole moment is
Charge on a piece of metal is \(-3.2\) coulomb. Number of excess electrons in the metal is:
The synonym of illustrious is:
The antonym of "expedite" is:
The antonym of ‘rigorous’ is:
The synonym of ‘diminish’ is:
The antonym of 'gather' is
The synonym of 'industrious' is:
The antonym of 'Modern' is:
The phrase 'pick holes in' means:
Allowance due to a wife from her husband on separation is
One who looks at the dark side of things is called:
The synonym of 'frank' is