Discovery of the Electron

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What is the charge of cathode rays?

Neutral

Variable

Positive

Negative (correct)

Who concluded that all atoms must contain electrons based on the behavior of cathode rays?

Dalton

Thomson (correct)

Bohr

Rutherford

When an external electrical field is present, how do cathode rays behave?

Travel straight from cathode to anode

Bend towards the positive plate (correct)

Remain stationary

Bend towards the negative plate

What is the name given to the particles constituting the cathode rays?

Electrons Signup and view all the answers

Why did Thomson conclude that all atoms must contain electrons?

Nature of cathode rays was the same irrespective of the metal or gas used in the cathode ray tube Signup and view all the answers

What did Thomson's conclusion about atoms being divisible imply?

Atoms are not indivisible as believed by Dalton and others Signup and view all the answers

What did Sir J.J. Thomson conclude about the particles constituting cathode rays?

They have negligible mass but travel very fast Signup and view all the answers

How do cathode rays behave in the absence of an external magnetic or electric field?

They travel in a straight line Signup and view all the answers

What was observed when very high voltage was passed across the electrodes in an evacuated tube?

Cathode produced a stream of particles Signup and view all the answers

What did Eugen Goldstein discover before the electron?

Anode rays Signup and view all the answers

What property of cathode rays makes them attract towards a positively charged plate?

Carrying negative charge Signup and view all the answers

What was found to be independent of the nature of gas in the cathode ray tube?

The charge to mass ratio Signup and view all the answers

Why were anode rays called canal rays?

For passing through holes in the cathode Signup and view all the answers

'Cathode rays travel from cathode to anode' implies that:

Electrons move from negative to positive terminals Signup and view all the answers

What was observed behind the perforated cathode when a high voltage was applied in Goldstein's experiment?

Faint red glow Signup and view all the answers

What characteristic did anode rays share with cathode rays?

Travel in straight lines Signup and view all the answers

Why were anode rays also called positive rays?

Due to their charge Signup and view all the answers

In Goldstein's experiment, what type of cathode was used?

Perforated cathode Signup and view all the answers