(B) Cathode rays are streams of fast-moving electrons. Their speed depends on the potential difference applied between the cathode and the anode. Typi

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(B) Cathode rays are streams of fast-moving electrons. Their speed depends on the potential difference applied between the cathode and the anode. Typically, the speed of cathode rays ranges from $1/10$ to $1/3$ of the speed of light $(c)$, which is approximately $3 \times 10^7 \, m/s$ to $1 \times 10^8 \, m/s$.

Class 12 Physics Dual Nature of Radiation and matter Cathode Rays and Electron Emission

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What is the speed of cathode rays?

A
Equal to the speed of light
B
Approximately $0.1c$ to $0.3c$
C
Zero
D
Greater than the speed of light

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Class 12 Questions

Class 12

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Chapter

Dual Nature of Radiation and matter

Subtopic

Cathode Rays and Electron Emission

Who discovered the presence of electric charge on an electron?

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Assertion: In a photoemissive cell,an inert gas is used.
Reason: An inert gas in the photoemissive cell provides a greater current.

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When subjected to a transverse electric field,cathode rays move

Easy

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What is the value (magnitude) of the electric field required for field emission?

Medium

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Which one of the following devices makes use of the electrons to strike certain substances to produce fluorescence?

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What is the speed of cathode rays?

Similar Questions

Who discovered the presence of electric charge on an electron?

Assertion: In a photoemissive cell,an inert gas is used.Reason: An inert gas in the photoemissive cell provides a greater current.

When subjected to a transverse electric field,cathode rays move

What is the value (magnitude) of the electric field required for field emission?

Which one of the following devices makes use of the electrons to strike certain substances to produce fluorescence?

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Assertion: In a photoemissive cell,an inert gas is used.
Reason: An inert gas in the photoemissive cell provides a greater current.