RRB Group D GK Questions 2026

Majuli lies in the braided channel of the Brahmaputra in Assam, where the river splits into many arms and deposits enormous quantities of silt.

Indira Point stands at the southern tip of Great Nicobar Island, the largest of the Nicobars, and it is the southernmost point of the territory of India.

It runs roughly along the ten degree north parallel, which is where it gets its name, and it divides Little Andaman in the north from Car Nicobar in the south, separating the two halves of the union territory.

The Deccan Trap was formed by vast fissure eruptions that spread sheet after sheet of lava over the north-western peninsula.

The Aravalli was folded in the Precambrian era, hundreds of millions of years before the Himalaya rose, and long erosion has reduced it to a chain of low residual ridges running north-east from Gujarat through Rajasthan towards Delhi.

The Palghat Gap is a wide trough about thirty kilometres across, and it is the principal natural break in the otherwise continuous wall of the Western Ghats.

Both rivers flow westward along faulted troughs, or rift valleys, that lie between the Vindhya and the Satpura ranges, and both empty into the Arabian Sea through estuaries instead of deltas.

Anaimudi stands in the Anaimalai hills of Kerala, where the Anaimalai, Palani and Cardamom hills meet, and rises to about 2,695 metres.

Where the rivers leave the hills they drop their coarsest load, and the resulting belt of gravel and pebbles is so porous that the smaller streams sink into it and vanish.

Lakshadweep is a group of small coral islands, atolls and reefs lying off the Malabar coast of Kerala in the Arabian Sea, built on a submarine ridge.

The resistance of a wire equals the resistivity of the material multiplied by the length and divided by the area of cross section.

It is the energy consumed by an appliance of one kilowatt working for one hour, and it equals three point six million joules.

The tangent drawn to a magnetic field line at any point gives the direction of the field at that point.

The fuse is a short piece of wire of low melting point placed in series in the live line, so that an excessive current melts it and breaks the circuit.

In 1831 Faraday showed that when the magnetic flux linked with a closed coil changes, whether by moving a magnet, moving the coil or changing the current in a nearby coil, a current is induced in it.

In Fleming's left hand rule the forefinger, the middle finger and the thumb of the left hand are held at right angles to one another: the forefinger points along the magnetic field, the middle finger along the current, and the thumb then gives the direction of the force.

Hold the conductor in your right hand with the thumb stretched along the direction of the conventional current; the way your fingers curl round the wire is the direction of the concentric magnetic field lines.

Tungsten has the highest melting point of all metals, well above three thousand degrees Celsius, so a thin tungsten wire can be heated until it glows white without melting.

By Ohm's law the resistance equals the potential difference divided by the current. Here the current must first be converted into the base unit: two milliampere is 0.002 ampere.

A microwave oven does not cook by passing a current through a resistance. It generates microwaves in a magnetron, and these waves make the water molecules in the food rotate rapidly, so the food heats from within by dielectric heating.