NDA GK Questions 2026

A dynamo, also called a generator, is turned by some mechanical agency such as falling water, steam or a bicycle wheel, and the rotation of a coil in a magnetic field produces an electric current by electromagnetic induction.

Kinetic energy is half the mass into the square of the speed, so when the speed is multiplied by two the energy is multiplied by two squared, that is four.

Household electricity is billed in these units, and one kilowatt hour, popularly called one unit, is the energy consumed when an appliance of one kilowatt runs for one hour; in SI terms it equals 3.6 million joule.

The horsepower is an older unit of power that survives in the rating of motors and vehicles, and one horsepower is taken as about 746 watt, that is roughly three quarters of a kilowatt.

Power is the rate of doing work, that is work divided by the time taken, so its unit is the joule per second, which is named the watt after James Watt.

Kinetic energy is the energy a body has because of its motion, and it grows with the square of the speed, so a body moving twice as fast carries four times the kinetic energy.

Work equals force into displacement into the cosine of the angle between them, and the cosine of ninety degrees is zero, so a force at right angles to the motion does no work at all.

Work is the product of force and displacement, so its unit is the newton metre, which is given the name joule; one joule of work is done when a force of one newton moves a body through one metre in its own direction.

The Desert National Park, spread over sand dunes and open grassland near Jaisalmer and Barmer, is the best known habitat of this tall, heavy ground bird, whose numbers have fallen sharply and which is the state bird of Rajasthan.

In a national park the whole ecosystem is protected, rights are settled before the area is notified, grazing and cultivation are prohibited and the boundary cannot be altered except through a resolution of the state legislature.

It added two categories beyond the national park and the sanctuary: a conservation reserve, usually on state land adjoining a protected area and meant to guard a corridor between habitats, and a community reserve, on private or community land where the people themselves agree to protect wildlife.

Hemis lies in the cold, high altitude desert of Ladakh, covers a very large stretch of mountain terrain, and is the best known habitat of the snow leopard, along with the bharal and the Tibetan wolf.

Silent Valley lies in the Nilgiri hills of Kerala and protects one of the last stretches of undisturbed tropical evergreen forest in the Western Ghats, whose best known resident is the lion-tailed macaque.

Dachigam lies close to Srinagar in Jammu and Kashmir and is the last stronghold of this deer, which moves between the upper and lower parts of the park with the seasons.

Keoladeo Ghana in Rajasthan is a shallow wetland created long ago as a duck shooting reserve of the rulers of Bharatpur, and it now shelters large numbers of resident and migratory birds every winter; it is a World Heritage Site.

It is the law under which a state government notifies a national park or a sanctuary, under which species are placed in schedules according to the protection they need, and under which hunting of protected animals is prohibited.

Project Tiger was launched a year after the Wild Life Protection Act came into force, and it created tiger reserves in which the core area is kept free of human activity while a buffer area allows regulated use; the National Tiger Conservation Authority now oversees the programme.

Kaziranga lies on the floodplain of the Brahmaputra in Assam, where tall elephant grass and seasonal flooding suit the rhinoceros, and the park is inscribed as a natural World Heritage Site.

Gir, in the Saurashtra region of Gujarat, is the only place where the Asiatic lion survives in the wild, and its dry deciduous forest and scrub make the habitat that keeps the population alive.

Declared in 1936 in the hills of present-day Uttarakhand, it was named after the governor of the United Provinces, later renamed Ramganga and finally named after the hunter turned naturalist Jim Corbett.