If the two waves of intensities \( I_1 \) and \( I_2 \) pass through the region in the same direction and at the same time, the sum of the maximum and minimum intensities is :

A transformer has an efficiency of 80%. It works at 3 kW and 120 V. If the secondary voltage is 240 V, what will be the secondary current ?

Frequencies in the UHF range normally propagate by means of :

The capacitances of three capacitors are in the ratio 2:3:4. Their equivalent capacitance in parallel combination is more than the equivalent capacitance in series combination by (21/26) pF. The capacitances of the capacitors are, respectively:

For an ammeter, voltmeter and galvanometer having resistances \( R_A, R_V \) and \( R_G \) respectively, the correct relation among these resistances:

The parameter to be increased in order to increase the angular magnification of a simple microscope is

It is observed that only 25% of a given radioactive sample is left undecayed after 16 days. What is the decay constant of the sample in \(\text{day}^{-1}\)?

Consider a binary operation \(*\) on \(N\) defined as \(a * b=a^3+b^3\), choose the correct answer :

The extraordinary sparkling of an appropriately cut diamond is due to

Match List - I with List - II.

List - I	List - II
(A) To study crystal structure	(I) IR ray
(B) To study structure of nuclei	(II) X-ray
(C) Take haze photography	(III) UV-ray
(D) Can cause fluorescence	(IV) \( \gamma \)-ray

Choose the correct answer from th options given below :

The equation of tangent to the curve given by \(x=a \sin ^3 t, y=b \cos ^3 t\) at a point where \(t=\frac{\pi}{2}\) is :

Read the paragraph given below and answer the question. If a person is born with a hereditary disease, can a corrective therapy be taken for such a disease? Gene therapy is an attempt to do this. Gene therapy is a collection of methods that allows correction of a gene defect that has been diagnosed in a child/embryo. Here genes are inserted into a person's cells and tissues to treat disease.
The first clinical gene therapy was given in to

Answer the question on the basis of passage given below :
Adsorption is a surface phenomenon and it differs from absorption which occurs throughout the body of the substance that absorbs. In physiosorption the attractive forces are mainly van der Waal's forces while in chemisorption ionic/covalent bonds are formed between particles of adsorbent and adsorbate. The catalytic activity of finely divided iron in Haber's process of ammonia manufacture can be explained by adsorption theory. Adsorption being an exothermic process, the heat of adsorption is utilised in enhancing the rate of the reaction. Adsorption has many applications being used in gas masks, control of humidity, chromatograph separation, curing diseases etc.
The modern adsorption theory lists the following steps for heterogeneous catalysis
(A) Adsorption of reactant molecules on the surface of a catalyst
(B) Occurrence of chemical reaction on the surface of a catalyst
(C) Desorption of products from a catalyst surface
(D) Diffusion of reactants to the surface of the catalyst
Choose the correct sequences of steps from the options given below: