Threshold frequency is the frequency : - Vidyadip

MCQ

Threshold frequency is the frequency :

A
Below which, the value of photoelectric current remains constant.
B
Below which, the photoelectric current increases with the potential difference.
C
At frequencies higher than this the photo-electric current becomes saturated.
✓
Photo-electrons are not emitted at frequencies lower than this.

✓

Answer

Correct option: D.

Photo-electrons are not emitted at frequencies lower than this.

(D) - Photo-electrons are not emitted at frequencies lower than this.

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