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Beams of charged particles are deflected by an electric field. In identical conditions the angle of
deflection of a particle is proportional to its charge / mass ratio.
In an experiment, protons are deflected by an angle of +15°. In another experiment under
identical conditions, particle Y is deflected by an angle of –5°.
What could be the composition of particle Y?
     protons    neutrons     electrons
1)      1               2                 2
2)       3              3                  5
3 )      4               5                  1 

Answer :

PBCHEM
Correct Answer: Option B:  3 protons, 3 neutrons and 5 electrons

Reason: 
Since, particle 'Y' deflected at an angle (–5°) opposite to that of proton (+15°), this suggest that particle 'Y' has charge opposite to the of proton. In option B, there are 3 protons and 5 electrons. Thus, net charge is -2. 

Also, magnitude of deflection of 'Y' particles is less as compared to protons, this signifies that, it is very heavy as compared to protons. Both of this criteria is satisfied by option B. Hence, it is correct choice. 
lhmarianateixeira

In this exercise, we have to use knowledge of the electrical field to identify the alternative that best responds:

Option B

Knowing some information given in the statement, we have that:

  • particle 'Y' deflected at an angle (–5°)
  • opposite to that of proton (+15°)

When we look at the options we realize that in option B, there are 3 protons and 5 electrons. Thus, net charge is -2.

When we analyze the magnitude we have that to satisfy the criteria would be the alternative B too, since magnitude of deflection of 'Y' particles is less as compared to protons.

See more about eletric field at brainly.com/question/12757739

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