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Heinrich Rudolph laid the foundation for the future development of radio, telephone and telegraph. The SI unit of _____ was named as ‘hertz’ in his honour.
Identify the SI unit of electrical resistance.
Which of the following instruments measures infra-red radiation?
A reversible and an irreversible engine are working between the same limits of temperature. The efficiency of
Hydraulic brakes used in automatic vehicles is direct virtual application of which law?
The force of attraction between an electron revolving around the nucleus and the nucleus is a _______ force?
Which of the following elements has the highest electrical conductivity?
Which is the most suitable unit for expressing nuclear radius?
Sounds of frequencies below 20 Hz are called _________
Which type of mirror is used by dentists to see large images of teeth?
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Apr 23SSC & Railway