state gov Uttarakhand Police Constable Mock Test Series 2024 - 25 General Knowledge Science Technology and Inventions
For which of the following discoveries in 1827 was the German physicist, Georg Simon Ohm best known?
1
For invention of the magnetometer, which is a device capable of measuring the direction and strength of a magnetic field
2
For developing a device capable of amplifying and modulating electromagnetic signals that could also function as an oscillator
3
For measuring the magnetic properties of nuclear particles
4
For clarifying the mathematical relationship between electrical current, resistance and voltage