What is peptization and coagulation?
Formation of sol from the precipitate by the addition of electrolyte is known as peptization. While the conversion of a... View Article
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A beam of unpolarised light is incident on a air-glass interface derive, using a suitable ray diagram that light reflected from the interface is completely polarised, when tan ip = μ?
When an unpolarised light is incident on air-glass interface and some of the light reflected back to medium, some of... View Article
A beam of unpolarised light is incident on the boundary between 2 transparent media if the reflected light is completely plane polarised, how is its direction related to the direction of corresponding refracted light?
When unpolarized light is incident on a transparent refracting medium, at a particular angle of incidence the reflected light and... View Article
Velocity of a certain mono chromatic light is 2.25 × 108 m/s to the given transparent medium find (a) critical angle? (b) polarization angle for this medium?
(i) Critical angle\(\begin{array}{l}{{theta }_{c}},\end{array} \)is given by \(\begin{array}{l}sin {{theta }_{c}}=frac{1}{mu }\end{array} \) We have to find the value of μ... View Article
When unpolarised light passes from air to transparent medium, under what condition does the reflected light get polarised?
The angle of incidence at which the reflected ray and refracted ray by transparent medium are mutually perpendicular each other,... View Article
Justify why the brewster angle for a transparent medium is different for different colours of lights?
Brewster’s law states that, the tangent of polarising angle of incidence to the transparent medium is equal to the refractive... View Article
What is polarization by reflection and brewster’s law?
We know from Ray optics when a light is incident on the surface of transparent medium of refractive index (μ),... View Article
What is the maxwell’s modification of ampere’s law?
Displacement Current Maxwell’s modification, applied to the above situation, consists of considering a mathematical equivalent current to pierce the surface... View Article
Explain the contradiction in Ampere’s Law
Let us consider a fundamentally different situation where a parallel-plate capacitor (A, B) is being charged as shown in Fig.... View Article
Explain the working of a toroid
A toroid or a toroidal coil or an anchor ring consists of a wire uniformly wound on a torus or... View Article
Explain the working of a solenoid
Answer: A solenoid is a common term for a wire coil used as an electromagnet. It also applies to any... View Article
State two applications of ampere’s law
Applications of Ampere law:- Infinite straight current-carrying wire:- \(\begin{array}{l}\oint{\overrightarrow{B}\centerdot \overrightarrow{\delta}}={{mu }_{o}}I\end{array} \) \(\begin{array}{l}B\oint{\overrightarrow{\delta }={{mu }_{o}}I},\Rightarrow B( 2\pi r)={{mu }_{o}}I\end{array} \)... View Article
Explain Sign Convention for Ampere’S Law
Sign convention: Fold ur Right hand fingers along the integration path, then the erect thumb gives the +ve current direction.... View Article
Explain and State Ampere’S Law With Equation
In case of Electric field we used gauss’s law to calculate the electric field for highly symmetric charge distributions; a... View Article
08 January 2020: PIB Summary & Analysis
Read the daily PIB update and stay up-to-date on current affairs for the UPSC exam. January 8th, 2020 PIB:- Download PDF Here... View Article
08 January 2020: The Hindu Analysis
UPSC Current Affairs Preparation: The Hindu Analysis Watch expert analysis of ‘The Hindu’ dated 8th January 2020. Important news and... View Article
Economy This Week (9th Dec to 22nd Dec 2019)
Economy is an important part of the UPSC prelims and mains exams; this series titled ‘Economy This Week’ has been initiated to... View Article
Economy This Week (25th Nov 2019 to 8th Dec 2019)
Economy is an important part of the UPSC prelims and mains exams; this series titled ‘Economy This Week’ has been initiated to... View Article
8 Jan 2020: UPSC Exam Comprehensive News Analysis
January 8th, 2020 CNA:- Download PDF Here TABLE OF CONTENTS A. GS 1 Related B. GS 2 Related POLITY AND... View Article
07 January 2020: PIB Summary & Analysis
Read the daily PIB update and stay up-to-date on current affairs for the UPSC exam. January 7th, 2020 PIB:- Download PDF Here... View Article
