What happens when light is refracted into a medium ?

A telescope has an objective lens of focal length 150 cm and an eyepiece of focal length 5.0 cm. The magnifying power of the telescope is

Which of the following statements is correct?

The magnetic flux through a coil perpendicular to the plane is varying according to the relation \( \phi = (7t^3 + 3t^2 - 2t - 2) \, \text{Wb} \). If the resistance of the coil is \( 10\Omega \), the induced current through the coil at t = 2 s, will be

A long solenoid has 500 turns. When a current of 2 A is passed through it, the resulting magnetic flux linked with each turn of the solenoid is \(4 \times 10^{-3} Wb\). The self-inductance of the solenoid is

Nuclear force exists between
A. Electron - Electron
B. Neutron - Neutron
C. Proton - Neutron
D. Proton - Electron
E. Proton - Proton
Choose the correct answer from the options given below :

If h is the Planck's constant, then the momentum of the photon having frequency \(v\) is represented by

Which of the following is not the salient feature of Human Genome Project (HGP)?

Find the odd one out with reference to terrestrial ecosystem:

The father of ecology in India is:

Select the correct combination of coordination number and type of hybridization, respectively, in "trigonal bipyramidal" complex

Two identical short bar magnets each of magnetic moment \( 12.5 \text{ Am}^2 \) are placed with 10 cm separation between their centers as shown in the figure. The magnitude of magnetic field at O is

Read the following paragraph carefully and answer the given questions.
In the year 1963 the two enzymes responsible for restricting the growth of bacteriophage in E. coli were isolated. The first restriction endonuclease - Hind II, whose functioning depended on a specific DNA nucleotide sequence was characterized five years later. It was found that Hind II always cut DNA molecules at a particular point by recognizing a specific sequence of six base pairs. This specific base sequence is known as the recognition sequence for Hind II. Besides Hind II, today we know more than 900 restriction enzymes that have been isolated from over 230 strains of bacteria, each of which recognize different recognition sequences.
In EcoR I the latter 'R' is derived from the -