KE vs Frequency — Practice Quiz

Question 1

If frequency of incident light is doubled (from 2f₀ to 4f₀), K_max:

Accepted Answer

Triples

Answer

Doubles

Answer

Quadruples

Answer

Same

Question 2

K_max vs f graph is a straight line with slope:

Accepted Answer

h

Answer

h/e

Answer

φ

Answer

1/h

Question 3

If K_max = 1 eV for light of frequency 6 × 10¹⁴ Hz, work function is:

Accepted Answer

1.48 eV

Answer

0.5 eV

Answer

2 eV

Answer

1.0 eV

Question 4

Increasing intensity of incident light:

Accepted Answer

Does not change K_max

Answer

Increases K_max

Answer

Decreases K_max

Answer

Doubles K_max

Question 5

For two metals of work functions φ₁ < φ₂, on a K_max vs f graph:

Accepted Answer

Both have same slope; metal 2's line is below metal 1's

Answer

Different slopes

Answer

Both lines identical

Answer

Metal 2's line is above metal 1's