State Exams GK Questions 2026

Sonar sends a pulse of sound into the water and times the echo returning from the sea bed, a shoal of fish or a submarine; since the speed of sound in sea water is roughly 1,500 metres a second, the time gives the distance.

NavIC is the name given to the Indian Regional Navigation Satellite System, or IRNSS, built by ISRO to give position fixes over India and a region around it, independent of the American GPS.

The Act was passed in 2005 as the National Rural Employment Guarantee Act and renamed after Mahatma Gandhi in 2009.

Radar sends out radio waves and measures the echo that returns from an object, so the time taken gives the distance, or range, and the shift in frequency gives the speed by the Doppler effect.

The agency was created by the General Assembly in 1946 as the United Nations International Children's Emergency Fund, for children in countries ruined by the Second World War, and in 1953 it was made a permanent part of the United Nations and renamed the United Nations Children's Fund, keeping the…

The IFSC is an eleven-character alphanumeric code that identifies a particular bank branch in the electronic payment systems operated by the Reserve Bank of India, and it is required for NEFT and RTGS transfers.

A laser produces a narrow, coherent, single-wavelength beam by stimulated emission, in which an excited atom is made to release a photon identical to the one that strikes it.

NITI Aayog replaced the Planning Commission on 1 January 2015 and works as the policy think tank of the Government of India.

The transmitter of an optical fibre link must be small enough to couple light into a core a few micrometres across, must switch on and off millions or billions of times a second, and must emit in a narrow band of wavelengths; a light-emitting diode meets these conditions, and for…

At the receiving end of an optical fibre link the light pulses must be turned back into an electrical signal, and that is the work of a photodiode, a reverse-biased junction in which incident photons generate charge carriers and so a current proportional to the light falling on it; PIN…

A fibre-to-the-home connection runs from the operator's equipment to the subscriber's premises over a distance of kilometres, and for such runs single-mode fibre is used: its core is only a few micrometres wide, so light travels along one path, there is no spreading of the pulse from different paths arriving…

In an optical fibre the glass core has a higher refractive index than the cladding around it, so light that meets the core-cladding boundary at an angle greater than the critical angle is reflected entirely back into the core instead of passing out, and it travels along the fibre in…

The International Telecommunication Union has adopted the framework recommendation for IMT-2030, which describes what 6G should achieve: terahertz and other very high frequency bands, latency below a millisecond, artificial intelligence built into the network, communication combined with sensing, satellite-extended coverage and better energy efficiency.

TRAI was set up under the Telecom Regulatory Authority of India Act, 1997, to regulate telecom services, fix tariffs and protect the interests of consumers once private operators entered the field.

The first mobile telephone call in India was made on 31 July 1995 between Kolkata and New Delhi, a year after the National Telecom Policy of 1994 opened mobile services to private operators.

The three categories actually defined are given in the other options.

Under IMT-2020 the peak downlink data rate for 5G is set at 20 gigabits a second, with 10 gigabits a second in the uplink; these are laboratory peaks under ideal conditions, not the speed a subscriber sees, and the separate target for the user experienced rate is 100 megabits a…

LTE is the radio technology through which 4G was delivered; the name was chosen because it was presented as the long-term evolution of the earlier 3G standards rather than a break with them.

The International Telecommunication Union names each generation of mobile telephony by a standard family, and 5G is IMT-2020, whose requirements include a peak downlink rate of 20 Gbps, a user experienced rate of 100 Mbps, one millisecond of air interface latency and a million connected devices in a square kilometre.

Commercial 5G services began in India on 1 October 2022, when they were launched at the India Mobile Congress in New Delhi, following the spectrum auction held earlier that year in the 600 MHz, 700 MHz, 3300 MHz and 26 GHz bands among others.