NDA GK Questions 2026

Light inside the fibre strikes the boundary at more than the critical angle, so it is reflected back again and again instead of escaping.

A speed radar measures how much the frequency of its reflected wave changes, and that change depends on the speed of the vehicle.

Both kinds of radiation carry energy that food absorbs as heat, and both are used in everyday kitchens. Infrared radiation is the heat radiation given out by hot bodies: a grill, a toaster, an oven element or glowing coals cook the surface of food mainly by infrared rays.

In January the northern oceans are warmer than the frozen continents, so isotherms bend north over the sea and south over the land; the Gulf Stream and North Atlantic Drift are warm currents, not cold ones.

A volcanic eruption throws out solid fragments, fine ash and dust, and a mixture of gases that includes nitrogen and sulphur compounds.

All three are adaptations of desert plants (xerophytes) that cut down water loss through transpiration. Plants lose most of their water through the leaves, so desert plants change their leaves to save it.

The troposphere is thickest over the equator because strong convection there carries heat high into the air. The troposphere, the lowest layer of the atmosphere where almost all weather occurs, is about 18 km thick at the equator but only about 8 km at the poles.

The atmosphere is heated mainly from below, by the Earth's own long wave (terrestrial) radiation, not directly by sunlight. Incoming solar radiation is short wave, and the atmosphere is largely transparent to it, so most of it passes through and heats the Earth's surface.

The Ministry of Defence stated that the Indian Naval Ship Sahyadri reached Vladivostok on 10 October 2026 to take part in the exercise, which has been scheduled from 13 to 18 October 2026 and begins with a harbour phase at that port before moving to coordinated activity at sea.

The Ministry of Defence says the participation of INS Sahyadri in the exercise is in keeping with this vision of the Government of India, which frames security and growth as goals to be pursued together across maritime regions rather than separately.

INDRA is the bilateral exercise between India and Russia, and in this edition the Indian Navy works with the Russian Federation Navy.

The exercise is presented as a reaffirmation of the shared commitment of the two countries to secure, open and free seas, and the Ministry of Defence places that commitment within the Comprehensive Strategic Partnership that the two sides set out in the India-UK Vision 2035 document.

The Sea Phase of the exercise is built around complex operational drills in all three of these domains.

KONKAN is described as the yearly bilateral maritime exercise between India and the United Kingdom, held with the Royal Navy, and the current edition is being conducted in the waters off Plymouth on the British coast in a harbour phase and a sea phase.

The Ministry of Defence stated that the guided missile stealth frigate INS Trishul had reached Plymouth in the United Kingdom, where it is scheduled to exercise with the Royal Navy in KONKAN-26.

The institute, which lies at Izatnagar near Bareilly, is the country's premier centre for veterinary research and teaching, covering animal diseases, vaccines and livestock production, and it has a second campus at Mukteswar in the Nainital district.

The institute is the country's reference laboratory for viral diseases, it tests and confirms outbreaks and it also works on vaccines; the National AIDS Research Institute is in the same city.

The institute works on food processing, preservation, packaging and nutrition, and it shares the city with the Defence Food Research Laboratory, so Mysuru is best remembered as the food research city.

The institute is a laboratory of the Council of Scientific and Industrial Research and studies the physics, chemistry, biology and geology of the seas around India, with regional centres at Kochi, Visakhapatnam and Mumbai.

The institute works on dryland farming, sand dune stabilisation, agroforestry and the management of grazing land in the arid west of the country, and it comes under the Indian Council of Agricultural Research.