The term “Kibble Balance” is often seen in news is related to which of the following? |ForumIAS

[A] Device to measure Planck Constant.

[B] Device to measure heat balance.

[C] Device to measure water balance.

[D] Device to measure wind balance.

Answer: A

Notes:

‘Kibble Balance’, is a device that was used to measure the Planck Constant and thereby reboot the kilogram.

Named after its inventor, Bryan Kibble at the U.K.’s National Physical Laboratory (NPL), who conceptualized it in 1975, the Kibble balance is an exquisitely accurate weighing machine.
Like any balance, it is designed to equalize one force with another: In this case, the weight of a test mass is exactly offset by a force produced when an electrical current is run through a coil of wire immersed in a surrounding magnetic field.

Source: The Hindu

Subscribe to get the latest posts sent to your email.