Q156 / 160 · AP EAMCET 2018 (22 Apr Shift 2) · Physics

The figures shows the variation of photocurrent $i$ with anode potential $V$ for three differential radiations. Let $I_a, I_b$ and $I_c$ be the intensities and $f_a, f_b$ and $f_c$ be the frequencies for the curves $a, b$ and $c$ respectively. Then Figure

  • Correct answer
    A
    $f_a=f_b$ and $I_a \neq I_b$
  • B
    $f_a=f_c$ and $I_a=I_c$
  • C
    $f_a=f_b$ and $I_a=I_b$
  • D
    $f_b=f_c$ and $I_b=I_c$

Solution

Stopping potentials for $b$ and $a$ are same $$ \therefore \quad f_a=f_b $$ and saturation current for $b$ and $a$ are different $$ \therefore \quad I_b \neq I_a $$

Hence, the correct answer is option: 'A'.

Relevant Questions