Three identical photocells are illuminated separately by monochromatic beams of the…

PHYSICS · Single correct · A Level · Physics · Particles and radiation · Particles and radiation

Problem

Three identical photocells are illuminated separately by monochromatic beams of the same frequency (

\nu > \nu_0

) but with intensities

I_1 = 0.5 I_0

I_2 = I_0

and

I_3 = 2 I_0

. Which of the following correctly arranges the corresponding saturation currents (

I_{1s}

I_{2s}

I_{3s}

) in ascending order? (a)

I_{1s}=I_{2s}=I_{3s}

(b)

I_{3s}<I_{2s}<I_{1s}

(c)

I_{1s}<I_{2s}<I_{3s}

(d)

I_{2s}<I_{1s}<I_{3s}