UPSC GK Questions 2026

Hounsfield, an engineer at EMI in Britain, built the first clinical CT scanner, and Cormack, a physicist, had independently worked out the mathematics of reconstructing a cross-section from measurements taken along many directions.

When sound is reflected from a moving target, the frequency of the echo is shifted: higher when the blood is moving towards the probe and lower when it is moving away.

Certain crystals develop a voltage across their faces when they are mechanically squeezed, and conversely change shape when a voltage is applied.

The tesla is the SI unit of magnetic flux density, and clinical MRI scanners commonly work at one and a half or three tesla, produced by a superconducting coil kept cold by liquid helium.

A single proton, the nucleus of ordinary hydrogen, has a spin and therefore a magnetic moment, and hydrogen is by far the most abundant such nucleus in the body because the body is largely water and fat.

The cutoff or minimum wavelength of the continuous X-ray spectrum arises when an electron gives up its entire kinetic energy in a single collision with the target.

The Hounsfield unit, named after Godfrey Hounsfield, expresses how strongly a small volume of tissue attenuates X-rays, on a scale fixed by definition at zero for water and minus one thousand for air.

MRI works by placing the hydrogen nuclei of the body in a strong static magnetic field and disturbing them with radiofrequency pulses, which lie in the harmless low-energy part of the electromagnetic spectrum.

Working with a discharge tube at the University of Wurzburg in November 1895, Roentgen noticed that a screen coated with a fluorescent salt glowed even when the tube was covered, and he traced the effect to an unknown penetrating radiation that he called X-radiation.

The linkage joined India's Unified Payments Interface with Singapore's PayNow, so that users of either system could send money across the border using a mobile number or a virtual payment address rather than full bank details.

Developed by the Institute for Development and Research in Banking Technology at Hyderabad and built on the INFINET network of the banking sector, it carries the secure, standardised messages behind the Reserve Bank's Real Time Gross Settlement and National Electronic Funds Transfer, and is also used for inland letters of…

The Liberalised Remittance Scheme allows a resident individual, including a minor, to remit up to that amount in a financial year for any permitted current account purpose such as travel, education, medical treatment, gifts and maintenance of relatives, and for permitted capital account purposes such as buying property or shares…

Under the arrangement, an authorised dealer bank in India opens such an account for the correspondent bank of a partner country.

The MT 1 category covers customer payments, and MT 103 is the standard instruction by which a bank asks its correspondent to pay a named beneficiary a stated amount, carrying the remitter's and beneficiary's details and the charges instruction.

Under the standard ISO 9362 a BIC has four characters identifying the institution, two identifying the country on the ISO 3166 list, and two identifying the location, which makes eight.

The nostro account itself lies in the books of the foreign correspondent and is denominated in foreign currency.

Vostro means yours, and from the Indian bank's point of view the account is your account with us. Such accounts are held in Indian rupees, and the foreign bank uses them to make and receive payments in India.

Nostro means ours, and the full sense is our account with you.

SWIFT transmits standardised, secure messages such as an instruction to pay a beneficiary or to issue a letter of credit.

SWIFT is headquartered at La Hulpe, in the outskirts of Brussels, and it is therefore incorporated under Belgian law and supervised by a committee of central banks with the National Bank of Belgium as the lead overseer.