List of practice Questions

Force of 80 Newton works between two point charges placed at a fixed distance apart in air. When these charges are placed at the same distance apart in a dielectric medium, then the force of 8 Newton works on it. The dielectric constant of the medium will be: 
 

The power consumed in alternating current in a circuit containing only a capacitor will be: 
 

 The maximum focal length of convex lens is for: 
 

The path of scattered \( \alpha \)-particle is: 
 

The Louis de Broglie wavelength of a particle having kinetic energy E is:

A moving charge produces: 
 

Electric charges are uniformly distributed in a small volume. The flux of electric field through a spherical surface of radius 2 cm surrounding the total charge is 10 V x m. The flux over a sphere of radius 4 cm will be:

What is meant by personality? Explain any five factors shaping personality.
Explain the types of intelligence tests with advantages and disadvantages.
Calculate the conductivity of an n-type semiconductor from the following data: Density of conduction electrons = \( 8 \times 10^{13} \, \text{cm}^{-3} \) Density of holes = \( 5 \times 10^{12} \, \text{cm}^{-3} \) Mobility of electrons = \( 2.3 \times 10^4 \, \text{cm}^2/\text{V-s} \) Mobility of holes = \( 100 \, \text{cm}^2/\text{V-s} \)

Explain the nature of Post-Traumatic Stress Disorder (PTSD).
Points:
(i) Meaning 
(ii) Shock stage 
(iii) Suggestible stage 
(iv) Recovery stage 
 

Explain postulates of Bohr's model for Hydrogen atom. Show the number of lines in the (A) emission and (B) absorption spectra of Hydrogen atom corresponding to transition between energy states \(n = 1\) and \(n = 4\).
Explain image formation in a reflecting telescope with the help of a ray diagram. Compare its qualities with a refracting telescope.

Explain the basic emotions given by Paul Ekman.
Points:
(i) Happiness 
(ii) Sadness 
(iii) Anger 
(iv) Fear 
 

Explain the laws of perceptual organization with suitable diagrams.
Points:
(i) Law of proximity 
(ii) Law of similarity 
(iii) Law of continuity 
(iv) Law of closure 
 

Calculate the following in the given circuit:
(A) The equivalent capacitance of the circuit.
(B) The charge on \( 3 \, \mu\mathrm{F} \) and \( 2 \, \mu\mathrm{F} \) capacitors.
\includegraphics[]{equivalent capac.PNG}

State and explain Gauss's law in electrostatics. Using it, find the electric field due to a uniformly charged thin spherical shell (charge = q and radius = R) at 

(A) external point of shell 

(B) internal point of shell 

(C) on the surface of shell. 
 

Find the maximum magnitude of velocity and linear momentum of a photoelectron emitted when light of wavelength 4000 Ã… falls on a metal having work function 2.5 eV. 
 

Sunita’s concentration in her studies was interrupted by the songs on the radio played loudly by the neighbors. So this is a description of which aspect of attention?
Satellites are used by the meteorological department to provide weather forecasts to farmers. So the function of satellites is based on which type of intelligence?
Anita consistently increased the amount of practice in sports. It also increased her playing skills. So what type of correlation is found between the amount of practice in sports and playing skills?
Case study method
Drug addiction
Benefits of emotional well-being in day-to-day life
Span of attention