What is the particle X in the fusion reaction shown below ?
\({ }_1^2 H +{ }_1^2 H \rightarrow{ }_2^3 He + X +3.27 MeV\)

A rod of infinite length is placed along the axis of a concave mirror of focal length f.
The near end of the rod is at a distance u > f from the mirror. The length of its image is:

The resistivity of a material depends on

If \( +\sigma \) and \( -\sigma \) are the uniform surface charge densities of two parallel infinite thin plane sheets then the net electric field at the mid point of the two sheets will be given by (Where \( \epsilon_0 \) is the permittivity of free space, where the sheets are kept)

Two particles carrying a charge of q = 2 nC each connected by an insulating string are placed r = 1 m apart on a smooth horizontal surface. The tension in the string is

A telescope has an objective of focal length 30 cm and an eyepiece of focal length 3.0 cm. It is focused on a scale distant 2.0 m. For seeing with relaxed eye, the separation between the objective and eyepiece would be:

In a semiconductor let the number of charge carriers be n and the average drift speed be v. An electric field is applied to it. If we increase the temperature of this semiconductor then :

Choose the incorrect statements from the options given below:
(A) In making a full wave rectifier, the two diodes are connected, with one in forward bias and the second in reverse bias.
(B) In a full wave rectifier, the output frequency is twice the input frequency.
(C) In a full wave rectifier, the current through the load resistance flows in one direction for half cycle and in the reverse direction for the other half cycle.
(D) In a full wave rectifier having two diodes and a resistance, the output voltage is uniform
Choose the correct answer from the options given below:

For the following probability distribution:

X	-4	-3	-2	-1	0
p(x)	0.1	0.2	0.3	0.2	0.2

Which of the following process does not occur at the interface of phases?

Read the following passage carefully and answer the given questions.
Bioactive molecule, cyclosporin A, that is used as an immunosuppressive agent in organ-transplant patients, is produced by the fungus Trichoderma polysporum. Statins produced by the yeast Monascus purpureus have been commercialised as blood-cholesterol lowering agents. It acts by competitively inhibiting the enzyme responsible for synthesis of cholesterol. Baculoviruses are pathogens that attack insects and other arthropods. The majority of baculoviruses used as biological control agents are in the genus Nucleopolyhedrovirus. These viruses are excellent candidates for species-specific, narrow spectrum insecticidal applications. They have been shown to have no negative impacts on plants, mammals, birds, fish or even on non-target insects. BOD refers to the amount of the oxygen that would be consumed if all the organic matter in one liter of water were oxidised by bacteria. The sewage water is treated till the BOD is reduced. Cheese, is one of the oldest food items in which microbes were used. Different varieties of cheese are known by their characteristic texture, flavour and taste. For example, the large holes in 'Swiss cheese' are due to production of a large amount of CO₂ by a bacterium named Propionibacterium sharmanii.
Statins are produced by:

Which of the following rRNA molecule has catalytic property in bacteria?

Observe the table and answer the given question :

How many codons with 'A' at second position code for amino acids ?