The cathode ray oscilloscope consists of main parts:
Two
Three
Four
Five
When we heat the metal at high temperature they emit:
Holes
Protons
Neutrons
Electrons
The instrument which is used to display the magnitude of changing electric current is called:
Evacuated tube
Cathode rays oscilloscope
Television tube
Picture tube
In totally reflecting prism one angle is of:
45°
90°
180°
120°
According to coulomb’s law, what happens to the attraction of two oppositely charged objects as their distance of separation increases:
Increases
Decreases
Remains unchanged
Cannot be determined