General Physics Questions And Answers


Q1. 
While comparing the alpha particle, neutron, and beta particle, the alpha particle has the lowest de – Broglie wavelength.

Ans.
True


Q2. 
Among the following four spectral regions, in which of them, the photon has the highest energy in?

Ans.
Violet


Q3. 
When a proton is accelerated through 1 V, then its kinetic energy will be 1 V.

Ans.
False


Q4. 
Which among the following shows the particle nature of light?

Ans.
Photoelectric effect


Q5. 
Two beams, one of red light and the other of blue light, of the same intensity are incident on a metallic surface to emit photoelectrons. Which emits electrons of greater frequency?

Ans.
Blue light


Q6. 
Which radiations will be most effective for the emission of electrons from a metallic surface?

Ans.
Ultraviolet


Q7. 
Photoelectric emission is possible at all frequencies.

Ans.
False


Q8. 
Two metals A and B have work functions 4 eV and 10 eV respectively. Which metal has a higher threshold wavelength?

Ans.
Metal A


Q9. 
Give the unit of work function.

Ans.
Electron volt


Q10. 
Identify the process in which an electron escapes from the metal surface.

Ans.
Electron emission