In the formation of a p-n junction diode, arrange the following processes in sequence.
(A) Diffusion of charge carriers
(B) Drift of charge carriers
(C) Doping
(D) Generation of electric field at the junction
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A capacitor of capacitance \(C_1\) is charged upto \(V\) volt and then connected to an uncharged capacitor of capacity \(C_2\). The final potential difference across each will be :

According to Rayleigh's law, the intensity of scattered light varies with wavelength \( \lambda \) as

Match List - I with List - II.

List - I	List - II
(A) Orbital radius of electron	(I) \( \propto \frac{1}{n} \)
(B) Orbital velocity of electron	(II) \( \propto n \)
(C) Orbital frequency of electron	(III) \( \propto \frac{1}{n^3} \)
(D) Angular momentum of electron List	(IV) \( \propto n^2 \)

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An inductor coil joined to a 12 V battery draws a steady current of 12 A. This coil is connected to a capacitor and ac source of rms voltage 12 V in series. What will be the rms current, if the current in the circuit is in phase with the emf?

The following that is not transported by Electromagnetic waves is :

A point charge Q is kept at the midpoint of a face of cube of side L. The electric flux emerging from the cube is

A coil has an inductance of \( L = 0.02 \text{ H} \) and the current is increasing at the rate of \( \frac{dI}{dt} = 200 \text{ A/s} \). The emf induced in it, \( \epsilon \), is:

Antiseptics and disinfectants either kill or prevent growth of micro-organism. Identify which of the following statements is not true?
(A) Disinfectants harm the living tissues.
(B) A 0.2% solution of phenol is an antiseptic while 1% solution acts as a disinfectant.
(C) Chlorine and Iodine are used as strong disinfectants.
(D) Dilute solution of boric acid and hydrogen peroxide are antiseptics
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Arrange the following electromagnetic waves in their increasing order of energy.
(A) Gamma rays
(B) X- rays
(C) Microwaves
(D) Infrared waves
(E) Ultraviolet rays
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Read the given passage carefully and answer the questions
Antibiotics have greatly improved our capacity to treat deadly diseases such as plague, whooping cough (kali khansi), diphtheria (gal ghotu) and leprosy (kusht rog), which used to kill millions all over the globe.
Streptokinase produced by the bacterium Streptococcus and modified by genetic engineering is used as a 'clot buster' for removing clots from the blood vessels of patients who have undergone myocardial infarction leading to heart attack. Microbes are diverse-protozoa, bacteria, fungi and microscopic animal and plant viruses, viroids and also prions that are proteinacious infectious agents. The puffed-up appearance of dough is due to the production of CO₂ gas. Similarly the dough, which is used for making bread, is fermented using baker's yeast (Saccharomyces cerevisiae). Primary sewage treatment basically involve physical removal of particles - large and small from the sewage through filtration and sedimentation. These are removed in stages; initially, floating debris is removed by sequential filtration. Then the grit (soil and small pebbles) are removed by sedimentation. All solids that settle form the primary sludge, and the supernatant forms the effluent. The effluent from the primary settling tank is taken for secondary treatment. The primary effluent is passed into large aeration tanks, where it is constantly agitated mechanically and air is pumped into it. This allows vigorous growth of useful aerobic microbes into flocs. While growing, these microbes consume the major part of the organic matter in the effluent.
Genetically modified Streptokinase is used as a 'clot buster' for removing clots from the blood vessels is produced by :

The carbylamine reaction is used as a test for

At sunrise and sunset the sun appears reddish due to