RRB JE GK Questions 2026

Pliers and scissors are each made of two arms joined at one rivet, and each arm is a complete class 1 lever, so the tool is called a double lever.

First find the throwing speed from the height: v squared equals u squared minus 2 g h gives u equal to the square root of 2 into 10 into 80, that is 40 metres per second.

Put the values straight into s equal to u t minus half g t squared, taking upward as positive: 30 into 4 gives 120, half of 10 into 16 gives 80, and the difference is 40 metres.

By the work-energy theorem the work done by a force equals the change in kinetic energy, so the work here is half of 4 kilograms times 5 metres per second squared, that is 0.5 into 4 into 25, which gives 50 joules.

Work done is force multiplied by the displacement along the force, so F equals the work divided by the distance, that is 480 joules divided by 15 metres, which gives 32 newtons.

Hooke's law holds only as far as the limit of proportionality, and that limit is either equal to or lower than the elastic limit, so statements 1 and 4 are the correct pair.

Silver bromide is the standard example of an ionic crystal that carries both kinds of point defect at the same time.

In a thermoplastic the polymer exists as long linear or lightly branched chains, and one chain is held to the next only by weak secondary forces such as van der Waals attraction.

The focal length of a mirror does not depend on the medium around it, so a convex mirror of focal length f in air keeps the focal length f inside the liquid.

Copper turns green because its surface slowly reacts with the air and gets covered by a layer of corrosion products, and that layer is green.

The Government of Jammu & Kashmir entrusted the auction of its mineral blocks to the Ministry of Mines, which carried out the process under the Central Government mineral auction route and announced the successful result.

The Wantrag Limestone Block covers 5.36 hectares and carries that estimated limestone resource, and it has been explored up to the G-3 stage, a stage reached with 159 metres of drilling.

Both the Koot-Kapran Limestone Block and the Wantrag Limestone Block lie in Anantnag district of the Union Territory, and the first of them is located more precisely in Koot and Kapran villages of Dooru Tehsil.

Both the blocks auctioned in the Union Territory are limestone blocks, named the Koot-Kapran Limestone Block and the Wantrag Limestone Block, and both lie in Anantnag district.

Naphthalene is an aromatic hydrocarbon, C10H8, with a very high proportion of carbon, so the air around the flame cannot supply enough oxygen to burn all of it to carbon dioxide.

The balanced equation for the complete combustion of glucose is C6H12O6 plus 6O2 gives 6CO2 plus 6H2O, so one mole of glucose needs six moles of oxygen gas.

Ultraviolet light is a transverse wave, not a longitudinal one, so this statement is the wrong one. In an electromagnetic wave the electric and magnetic fields vibrate at right angles to each other and to the direction the wave travels, which is the definition of a transverse wave.

A 301 reply means Moved Permanently: the page now lives at a new address and the browser or search engine should use that address from now on.

Ampere-turns per metre, written AT/m, is the unit of magnetic field strength, because H is the magnetomotive force set up per unit length of the magnetic path.

An alkene carries one carbon-to-carbon double bond, and that bond uses up two hydrogen atoms that a saturated chain would have held, so the formula drops from CnH2n+2 to CnH2n. Putting n equal to 2 gives C2H4, ethene, the simplest alkene; n equal to 3 gives C3H6, propene.