police AP Police Constable (Pre + Mains) Mock Test 2022 General Science Physics Measuring Instruments
Which of the following statements is not true?
1
CO2 LASER can be used for cutting stainless steel.
2
Magnetic Resonance Imaging (MRI) is used) for obtaining detailed images of the brain and it does not use radiation.
3
RADAR system is used to detect enemy’s missiles.
4
SONAR technique is used to do gold plating on silver ornaments.