Quantum

Question 1

Charge on an electron

Answer 1

1.6×10⁻¹⁹C

Question 2

An electron volt (eV)

Answer 2

The energy gained by 1 electron when it is accelerated through a potential difference of 1 volt.

Question 3

What is the rate of emission of photo-electrons dependant on?

Answer 3

The intensity of radiation (frequency can also effect this as higher frequencys can release electrons deeper into the surface)

Question 4

Prompt emission

Answer 4

Where photo-electrons are emitted as soon as light is incident on a metal surface (even if low intensity)

Question 5

Work function

Answer 5

Minimum energy required to release electrons

Question 6

Effect on current in photoelectric cell if intensity is doubled

Answer 6

• Twice as many photons per seccond
• Twice as many electrons released per seccond
• Current doubles

Question 7

Stopping potential

Answer 7

The potential required to stop any electron from escaping from the metal surface (equal to Ekmax)

Question 8

Effect of increasing light intensity

Answer 8

Increases in the number of photons

Question 9

Effect of increasing frequency of light

Answer 9

Photons have more energy

Question 10

Wave behaviour of a photon

Answer 10

Interference and diffraction

Question 11

Particle behaviour of a photon

Answer 11

Photoelectric effect

Question 12

Wave behaviour of an electron

Answer 12

Electron diffraction

Question 13

Particle behaviour of an electron

Answer 13

Deflection in electric and magnetic fields, and collisions