Electron Discovery by J.J. Thomson
The electron was discovered by J.J. Thomson in the year 1897.
Thomson conducted experiments using cathode ray tubes. He demonstrated that cathode rays consisted of negatively charged particles, which he initially called "corpuscles". These particles were later named electrons. His work fundamentally changed the understanding of atomic structure.
Contributions of Other Scientists
- Ernest Rutherford: Known for discovering the atomic nucleus and the proton through his gold foil experiment.
- James Chadwick: Discovered the neutron in 1932.
- Niels Bohr: Proposed the Bohr model of the atom, explaining electron orbits and energy levels.
Therefore, J.J. Thomson is credited with the discovery of the electron.
The correct option is C.
Similar Questions
This curve is drawn for a given mass of a gas. This curve represents an:
- Number of degree of Freedom of a molecule of Oxygen (O$_2$) gas is:
- The condition for dark fringes in single slit diffraction is given by
$\sin\theta = \frac{m\lambda}{a}$
in case, light from the entire slit arrives at point of observation in phase, for a bright band $\sin\theta$ is equal to: - If '$\omega$' is the angler frequency and 'k' is the wave number represents a photon of energy E and momentum 'P' through the wave function E$_y$ (x, t) = A $\sin$ (kx$-\omega$t)
Which of the following relation is true: $\vec{B}$ is constant, No current in the cube. Cube is moving with '$\vec{v}$' velocity. The direction of electric force on the electron inside this cube is:
- Proton is discovered by
- Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: Curl of electric field is zero
Reason R: Linear integral of electric filed around a closed path is evidently zero.
In the light of the above statements, choose the most appropriate answer from the options given below - Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: A conductor is an equipotential
Reason R: $\nabla \cdot \vec{B} = 0$, $\vec{B}$ is magnetic field
In the light of the above statements, choose the most appropriate answer from the options given below - ________ dyes are salts of sulfonic or carboxylic acids. They are used to dye fibers with basic groups such as wool, silk and polyamides.
- Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: Failure to achieve expected height/length as compared to healthy, well nourished children of the same age is a sign of stunting.
Reason R: Stunting represents a recent failure to receive adequate nutrition such as due to acute diarrhoea.
In the light of the above statements, choose the most appropriate answer from the options given below
Important Questions from Mixed Topic (CUET PG)
- Who was the founder of Bolshevik Communist party?
- What is the key guide to statecraft in the realist tradition?
- Chronologically arrange the events in the Cold War period.
A. Berlin Wall is constructed
B. Communist China joins the UN
C. Soviet invasion of Czechoslovakia
D. Berlin Blockade
Choose the correct answer from the options given below: Morgenthau's principles of political realism are:
A. Politics is rooted in permanent and unchanging human nature which is basically self centred, self-regarding and self-interested
B. Politics is an autonomous sphere of action and cannot therefore be reduced to morals
C. International Politics is an arena of conflicting self-interests
D. The ethics of international relations is situational ethics which is very different from private morality
Choose the correct answer from the options given below:Who among the following political thinkers consider the anarchical self help system to be a compelling factor for States to maximise their relative power positions?
