When ultraviolet light is incident on certain metallic p&...
When ultraviolet light is incident on certain metallic p articles are emitted. These particles are called
positrons
protons
photoelectrons
photons
Correct answer is D
No explanation has been provided for this answer.
Which of these statements are correct for the pressures in liquids? i. pressure in a liquid at a ...
Why is it impossible for the lines of force of an electric field to cross one another? ...
Highly polished silvery surfaces are ...
The diameter of a brass ring at 30 °C is 50.0 cm. To what temperature must this ring be heated t...
Three cells each of e.m.f 1.5 V and internal resistance 2.5Ω are connected as shown in the dia...
Which of the following statements best describes a rigid body? A body which ...
The S.I unit of moment of a force is ...
A boy in a barber's shop sits between two parallel mirrors. The number of images observed by him...