Physics · PYQ NEET UG 2020
हिन्दीLight of frequency \( 1.5 \) times the threshold frequency is incident on a photosensitive material. What will be the photoelectric current if the frequency is halved and intensity is doubled?
Correct answer · Option 3
zero
Explanation
New frequency becomes \( 1.5 \nu_0 / 2 = 0.75 \nu_0 \), which is less than the threshold frequency \( \nu_0 \). Thus, photoelectric emission stops completely, making the current zero.