Defence GK Questions 2026

A great circle is one whose plane passes through the centre of the sphere and which therefore divides it into two equal halves.

The Tropic of Cancer passes through eight states, namely Gujarat, Rajasthan, Madhya Pradesh, Chhattisgarh, Jharkhand, West Bengal, Tripura and Mizoram.

The earth completes one rotation of 360 degrees in 24 hours, that is 1,440 minutes, and dividing 1,440 by 360 gives four minutes for every degree of longitude.

This meridian passes near Mirzapur in Uttar Pradesh and runs roughly through the middle of the country, so it was adopted as the standard meridian of India.

Whether the hands are moved or not, the momentum of the ball must be brought down to zero.

Inertia is the tendency of a body to resist any change in its state of rest or of uniform motion, and the heavier the body the harder it is to start or to stop.

The slope of any graph is the change on the vertical axis divided by the change on the horizontal axis; here that is distance divided by time, which is speed by definition.

The third law says that to every action there is an equal and opposite reaction, and the crucial point is that the two forces act on two different bodies.

On a velocity-time graph the height of the curve is velocity and the base is time, so the area enclosed is velocity multiplied by time, which is displacement.

The three equations of uniformly accelerated motion are v equals u plus at, s equals ut plus half of a t squared, and v squared equals u squared plus twice a s, where u is the initial velocity, v the final velocity, a the acceleration, t the time and s…

While the bus is moving, the passenger's whole body moves with it. When the brakes are applied, the feet stop along with the floor of the bus, but the upper body tends to keep moving forward at the same speed, and the passenger is thrown forward.

Momentum is the product of mass and velocity, so its unit is the unit of mass multiplied by the unit of velocity, that is kilogram multiplied by metre per second.

Before firing, the gun and the bullet are at rest, so the total momentum of the system is zero.

It states that the rate of change of momentum of a body is proportional to the applied force and takes place in the direction of the force.

It is the shortest distance from the starting point to the finishing point together with the direction of that straight line, so it has both magnitude and direction and is therefore a vector.

The first law states that a body continues in its state of rest or of uniform motion in a straight line unless an unbalanced external force acts on it, which is exactly the property called inertia.

When forests are cleared, wetlands drained and grasslands ploughed, species lose the space they need, and the fragments that survive are often too small to support large animals or to allow populations to mix and breed.

The day marks the adoption of the text of the Convention on Biological Diversity and is used each year to draw attention to the loss of species and habitats.

Ex-situ conservation means protecting a species away from its natural habitat, and a seed bank does exactly that by storing seeds under controlled temperature and humidity for future use.

Project Tiger was launched to protect the tiger by conserving the habitat it needs, and because the tiger sits at the top of the food chain, saving it protects the whole forest below it.