Electron MCQ 1

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What is the charge of a neutron?

Variable

+ 1.6 × 10-19 C

– 1.6 × 10-19 C

Zero (correct)

What is the minimum energy needed to remove the loosest electrons from the surface of a metal?

Work function Φ (correct)

Kinetic energy

Thermionic emission

Electric potential energy

What is the unit of energy gained or lost by an electron when it moves through a potential difference of 1 V?

Ampere

Joule

Electronvolt (correct)

Watt

In a cathode ray tube, what happens to the electrons when they strike the screen?

They convert their kinetic energy to light energy Signup and view all the answers

What type of radiation has extremely high frequency and short wavelength?

X-rays Signup and view all the answers

What is the process by which electrons are emitted from the surface of a hot metal?

Thermionic emission Signup and view all the answers

What is the energy converted to when an electron moves through an electric field?

Kinetic energy Signup and view all the answers

What is the energy of a photon proportional to?

The frequency of the associated light Signup and view all the answers

What is the minimum frequency needed to cause photoelectric emission?

Threshold frequency Signup and view all the answers

What is the function of a photocell?

To measure the intensity of light Signup and view all the answers

Electron MCQ 1

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Questions and Answers

What is the charge of a neutron?

What is the minimum energy needed to remove the loosest electrons from the surface of a metal?

What is the unit of energy gained or lost by an electron when it moves through a potential difference of 1 V?

In a cathode ray tube, what happens to the electrons when they strike the screen?

What type of radiation has extremely high frequency and short wavelength?

What is the process by which electrons are emitted from the surface of a hot metal?

What is the energy converted to when an electron moves through an electric field?

What is the energy of a photon proportional to?

What is the minimum frequency needed to cause photoelectric emission?

What is the function of a photocell?

What is the force on a charged particle moving through a magnetic field equal to?

What is the work function of a metal equal to?

What is the energy of a photon equal to?

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