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Thomson's Model of an Atom

Name the scie...

Question

Name the scientist who first measured the e/m ratio of an electron.

A

J. J Thomson

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B

James Chadwick

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C

Dalton

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D

Rutherford

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Solution

The correct option is A
J. J Thomson

J.J Thomson was the first scientist who measured charge to mass ratio(e/m) of an electron. When a narrow beam of charged particles are projected at constant speed (v) across a magnetic field in a direction perpendicular to the field, the beam of particles experiences a force, which makes them move in a circular path.

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Similar questions

The subatomic particle called electron was discovered by :

(a) J.J. Thomson

(b) Neils Bohr

(c) James Chadwick

(d) E. Goldstein

Q. Match column A (name of the Scientists) with column B (their contributions towards the understanding of the atomic structure).

Column A	Column B
A. Ernest Rutherford	1. Indivisibility of atoms
B. J.J Thompson	2. Stationary orbits
C. Dalton	3. Concept of nucleus
D. Neils Bohr	4. Discovery of electrons
E. James Chadwick	5. Atomic number
F. E Goldstein	6. Neutron
G. Moseley	7. Canal rays

Q. Question 30
Match the names of the Scientists given in Column A with their contributions towards the understanding of the atomic structure as given in Column B.

A B
(a) Ernest Rutherford (i) Indivisibility of atoms
(b) J.J.Thomson (ii) Stationary orbits
(c) Dalton (iii) Concept of nucleus
(d) Neils Bohr (iv) Discovery of electrons
(e) James Chadwick (v) Atomic number
(f) E. Goldstein (vi) Neutron
(g) Mosley (vii) Canal rays

Q. Question 30
Match the names of the Scientists given in Column A with their contributions towards the understanding of the atomic structure as given in Column B.

A B
(a) Ernest Rutherford (i) Indivisibility of atoms
(b) J.J.Thomson (ii) Stationary orbits
(c) Dalton (iii) Concept of nucleus
(d) Neils Bohr (iv) Discovery of electrons
(e) James Chadwick (v) Atomic number
(f) E. Goldstein (vi) Neutron
(g) Mosley (vii) Canal rays

Q. Who is the scientist ho first measured the e/m ratio of electron?

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