List of top Physics Questions asked in UP Board XII

On which factors and how do the following depend? 

(i) Internal resistance of cell 
(ii) Resistance of conductor

In a spherical mirror, the distance between the focus point and centre of curvature is \( 20 \, \text{cm} \). Calculate the following and write their names: (i) The distance of pole of mirror from its focal point.
(ii) The distance of pole of mirror from its centre of curvature. \vspace{0.5cm} (i) The distance of pole of mirror from its focal point

Compare the Astronomical Telescope and Compound Microscope on the basis of the following: 

(i) Components
(ii)Magnifying power
Explain with reason whether any one of the above devices can be used as the other device.
(i) Components

Represent the variation of binding energy per nucleon with mass number. On the basis of it, explain the following: (i) Nuclear fission
(ii) Nuclear fusion
(iii) Nuclear energy
The energy of a hydrogen atom in an energy state is \( -3.4 \) electron-volts. For an electron in this energy state, calculate the following: (i) Binding energy
(ii) Ionization potential
(iii) The number of energy states
(iv) The angular momentum
(v) Kinetic energy
(i) Binding Energy
On what factors does the magnetic flux linked with a coil depend? Explain the induced electromotive force on the basis of the following:
(i) Cause
(ii) Magnitude
(iii) Direction
On what principle does the transformer work? State the following conditions for an ideal transformer:
(i) Leakage of magnetic flux
(ii) Resistance of primary coil
(iii) Resistance of secondary coil
(iv)Dissipation of power
Write the relation between SI and MKS units of electric power.
If the resistance of ammeter and milli-ammeter are \( x_1 \) and \( x_2 \) respectively, then:
In nuclear reaction, \( _{7}^{15}N + _{0}^{1}n \rightarrow _{6}^{14}C + P \), what is P?
What is the nature of n-type semiconductor?
In lens maker formula \( \frac{1}{f} = (n-1) \left( \frac{1}{R_1} - \frac{1}{R_2} \right) \), which focal length is used?
When a capacitor of capacity \( C \) is charged with charge \( q \) and potential difference \( V \), the electric field \( E \) and the electrostatic energy \( U \) is obtained between plates of capacitor. If the capacitor is disconnected from the source and a slab of medium having the same thickness and dielectric constant \( k \) is introduced completely between the plates, calculate the new values of the following:
(i)Capacity
(ii) Potential difference
(iii) Charge
(iv) Electric field
(v) Electrostatic potential energy
(i) Capacity
What is \( p\text{-}n \) junction rectifier? Draw circuit diagram of (i) half-wave rectifier (HWR) and (ii) full-wave rectifier (FWR). (i) Half-Wave Rectifier (HWR)
The angle of prism is equal to its minimum deviation angle (\( \delta_m \)). In minimum deviation condition, calculate the following: (i) The angle of incidence
(ii) The angle of refraction
(iii) The refractive index of the material of the prism.
A proton, a deuteron and an alpha particle of same velocity enter perpendicularly in an uniform magnetic field of \( 10^5 \) tesla. Calculate the ratio of their time periods of revolution.
A plane electromagnetic wave is represented by the equation \[ E = 100 \cos(6 \times 10^8 t + 4x) \, \text{volt/metre}. \] Calculate the following:
(i) The refractive index of the medium
(ii) The velocity of electromagnetic wave in the medium
(iii) The expression for magnetic field
A cell has electromotive force \(1.5\) volt and internal resistance \(0.2\) ohm. It is connected with an external resistance of \(2.8\) ohm. Calculate (i) the potential difference across the open ends of the cell and (ii) the current obtained from the cell.
Define energy band in solids.
Who discovered the photoelectric effect?
How are optical ray and wavefront related with each other?
If the mass defect of a nucleus is \(2 \times 10^{-6}\) kg, then calculate its binding energy in (i) joule and (ii) electron-volt.
A capacitor of capacity \(10 \, \mu F\) is charged with a source of \(2\) volt. Calculate (i) the energy obtained from the source and (ii) the energy stored in the capacitor.
If \( \varepsilon_0 \) and \( \mu_0 \) represent permittivity and permeability of free space, then \( \frac{1}{\sqrt{\varepsilon_0 \mu_0}} \) represents which physical quantity?
If wavelength \( \lambda \) represents wave property and momentum \( p \) represents the particle property, then what will the expressions \( \lambda = \frac{h}{p} \) and \( p = \frac{h}{\lambda} \) represent?