List of practice Questions

Explain refraction of light by Huygens wave theory, when waves enter from denser to rarer medium.
Obtain the formula for the intensity of electric field on the equatorial point of an electric dipole.
What is Gauss' law? Find the formula for the intensity of electric field produced due to a point charge with the help of it.
The equivalent capacitance is 20 \( \mu \)F by joining two capacitors of capacitances \( C_1 \) \( \mu \)F and \( C_2 \) \( \mu \)F in parallel. If they are joined in series, the equivalent capacitance is 4.8 \( \mu \)F. Find the ratio of the capacitances \( C_1 \) and \( C_2 \) ( \( C_1>C_2 \)).
What is displacement current? A plane electromagnetic wave of 25 MHz frequency is propagating along the x-axis in vacuum. The electric field at any point in the vacuum is \( \vec{E} = 6 \hat{j} \) volt/metre. What is the magnitude and direction of the magnetic field \( \vec{B} \) at this point?
When does the force acting between two parallel and straight current carrying conductors become (i) attractive and (ii) repulsive and why?
Define 1 henry of self-inductance.
Define mass defect and binding energy.
Find the ratio of de-Broglie wavelength associated with a proton and an \( \alpha \)-particle having the same kinetic energy.
Obtain the formula of the relationship of drift velocity and potential difference.
What is meant by angle of polarisation?
Write the definition and unit of current density.
In order to pass 10\% of the main current in a galvanometer of resistance \( R \), the required resistance of shunt should be:
In the given nuclear process, particle \( W \) is: \[ ^2\text{He}^4 + _zX^A \rightarrow _{z+2}Y^{A+3} + W \]
The unit of \( \sqrt{LC} \) (where \( L \) is inductance and \( C \) is capacitance) is:
Threshold wavelength for a photoelectric cell is \( \lambda_0 \). If the work-function of the cathode of some other cell becomes \( n \) times that of the first cell, then threshold wavelength for the other cell will be:
What are the microwaves? State one use of them.
Write the expression and unit of magnetic dipole moment.
The refracting angle of a prism of refractive index \( \sqrt{3} \) is equal to its angle of minimum deviation. The value of angle of minimum deviation is:

Calculate the time required to deposit 2.4 g of Cu, when 2.03 A of current is passed through \( \text{CuSO}_4 \) solution. 
(At. mass of Cu = 63.5 g mol\(^{-1}\))

Write the classification of proteins with an example.
Derive an expression for maximum work obtainable during isothermal reversible expansion of an ideal gas from initial volume \( V_1 \) to final volume \( V_2 \).

Write the definition and dimensional formula of electrical conductivity. 
 

Write the condition of reverse osmosis.

Which value of current does the ammeter used in A.C. circuit measure?