Physics
Electron microscope works on which of the following principles?

Optical interference
Motion of charged particle in electromagnetic fields
Faraday's law of Electromagnetic induction
Wave Nature of electrons

ANSWER DOWNLOAD EXAMIANS APP

Physics
RADAR is used for:

detecting and locating the position of objects such as Aeroplanes.
locating submerged submarines.
locating geostationary satellites.
receiving a signals in a radio receiver.

ANSWER DOWNLOAD EXAMIANS APP