RRB ALP GK Questions 2026

The longer wire's resistance works out to 2.88 times that of the shorter one, which is 188% more. Resistance is R = ρL/A, where ρ is the resistivity of the material.

To just complete a vertical circle, a bob on a string needs a speed of at least √(5gL) at the lowest point, and √(5 × 10 × 0.5) = √25 = 5 m/s. A string can only pull, never push.

The bonus was approved on the strength of the railways' performance in 2025-26, and the government cited a record freight loading of 1,670 million tonnes for that year together with a passenger count of nearly 7.41 billion.

That is the amount the Union Cabinet approved for paying a bonus of 78 days' wages to railway employees, and it is spread across 11,40,770 employees.

The Union Cabinet cleared a Productivity Linked Bonus equal to 78 days' wages for railway employees, and this is the figure every other number in the decision hangs on: the total sanctioned amount, the per-employee ceiling and the count of employees covered are all tied to the same 78 days.

When the two mix, they release a rush of carbon dioxide that pushes water out onto the fire. In a soda-acid extinguisher a small bottle of dilute sulphuric acid sits inside a cylinder filled with a solution of sodium hydrogencarbonate (baking soda, NaHCO3).

Natural chlorine is a mixture of two isotopes, and their weighted average is about 35.5 u. Chlorine has two stable isotopes: chlorine-35, which makes up about 75 per cent of natural chlorine, and chlorine-37, about 25 per cent.

Above the threshold, the kinetic energy of the ejected electrons rises as the frequency of the light rises, so the statement that it does not change is wrong.

Charge equals current multiplied by time, so Q = 1.5 A × 0.010 s = 0.015 C. Electric current is the rate at which charge flows, I = Q/t, so the charge that passes in a given time is Q = I × t. One ampere means one coulomb of…

High pressure pushes the gas molecules close together and low temperature slows them down, so the attractive forces can hold them as a liquid.

The triple point is the single temperature and pressure at which the solid, liquid and vapour phases of a substance exist together in equilibrium.

Where oil meets water, the unequal pull of their molecules sets up a surface (interfacial) tension that keeps the two liquids as separate layers.

The de Broglie wavelength depends only on momentum, so equal wavelengths mean equal momenta. In 1924 Louis de Broglie proposed that every moving particle has a wave linked to it, with wavelength λ = h/p, where h is Planck's constant and p is the linear momentum.

This is the incorrect statement, because periodic motion repeats after every interval T, again and again. The time period T of a pendulum is the time for one complete oscillation, that is, the smallest interval after which the bob returns to the same position moving in the same direction.

A chemical reaction produces only internal forces, which cannot change the motion of the centre of mass but can change internal kinetic energy.

Latent heat is absorbed during a change of state while the temperature stays fixed. When water boils at 100 °C, adding more heat does not raise its temperature; the energy goes into breaking the attractions between molecules so that liquid turns into vapour.

The stone takes 2 s to fall 20 m, and in that time it moves 12 × 2 = 24 m sideways.

The heater's resistance is 220/0.5 = 440 Ω, so at 120 V the current is 120/440, about 0.27 A. By Ohm's law, V = IR, and for an ohmic conductor at a steady temperature the resistance stays the same.

It gives the direction of the force on a current-carrying conductor placed in a magnetic field. Stretch the thumb, forefinger and middle finger of the left hand so that they are mutually perpendicular.

Two equal forces give a resultant of the same size only when they are 120° apart, and the resultant then makes 60° with each.