If an agricultural field is liberally irrigated for a prolonged period of time, it is likely to face problem of
1] salinity
2] metal toxicity
3] alkalinity
4] acidity

Prolonged liberal irrigation of agricultural fields is likely to create the problem of

Prolonged liberal irrigation of agricultural fields is likely to create the problem of

Prolonged water logging in an agricultural fields is likely to create the problem of

A bar magnet suspended freely in a uniform magnetic field is vibrating with a time period of 3s. If the field strength is increased to 4 times of the earlier field strength, then the time period (in second) will be

Two bar magnets of the same length and breadth but having magnetic moments M and 2M are joined with like poles together and suspended by a string. The time of oscillation of this assembly in a magnetic field of strength B is 3 sec. What will be the period of oscillation, if the polarity of one of the magnets is changed and the combination is again made to oscillate in the same field ?

Two protons enter a region of transverse magnetic field. What will be ratio of time period of revolution if the ratio of energy is 2 sqrt2 : sqrt3 ?

Name the element An alkaline earth metal present in group 2 and period 3.

Three persons, Aman, Bipin and Mohan attempt a Mathematics problem independently. The odds in favour of Aman and Mohan solving the problem are 3:2 and 4:1 respectively and the odds against Bipin solving the problem are 2 :1 Find (i) The probability that all the three will solve the problem (ii) The probability that problem will be solved

The magnetic field is confirmed in a square region. A positive charged particle of charge q and mass m the limiting velocities of the particles so that it may come out of face (1), (2), (3), and (4).

The electric field vecE_1 at one face of a parallelopiped is uniform over the entire face and is directed out of the face. At the opposite face, the electric field vecE_2 is also uniform over the entire face and is directed into that face (as shown in figure). The two faces in question are inclined at 30^@ from the horizontal, vecE_1 and vecE_2 (both horizontal) have magnitudes of 2.50 xx 10^(4) NC^(-1) and 7.00 xx 10^(4)NC^(-1) . respectively. Assuming that no other electric field lines cross the surfacesof the parallelopiped, the net charge contained with in is