Page 696 - SUBSEC October 2017_Neat

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Item 36 refers to the following diagram

Carbon
Resulting Pattern
on screen
Electrons

Ring Pattern
Evacuated Screen
Tube

36. A beam of electrons is made to strike a thin 38. An isotope of nickel is represented by
layer of carbon in an evacuated tube as Ni. Which line in the following table
60
28
shown in the diagram above. correctly describes a neutral atom

This experiment provides evidence for of this isotope?

(A) interference
(B) polarisation Number of Number of Number of
(C) the particle nature of light Neutrons Protrons Electrons
(D) the wave nature of particle
(A) 32 28 32
(B) 32 28 28
37. An object of mass m has kinetic energy, (C) 60 32 28
E . Which of the following is a correct (D) 28 32 28
k
expression for its de Broglie wavelength?

(A) Item 39 refers to the following diagram.

(B)

Stopping
Potential
(C)

(D)
f 0 f A Frequency

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02238010/SPEC 2017