The work functions of three metals A, B and C are WA, WB and WC respectively. They are in decreasing order. The correct graph between kinetic energy and frequency ν of incident radiation is

Question

The work functions of three metals A, B and C are WA, WB and WC respectively. They are in decreasing order. The correct graph between kinetic energy and frequency ν of incident radiation is (A) Option 1

(B)

(C)

(D)

Tardigrade Admin · Accepted Answer

Irrespective of the photosensitive material used, the slope of each line should be same, since slope

= \frac{h}{e}

Since,

W_{A} > W_{B} > W_{C} \Rightarrow ((ν)_{0})_{A} > ((ν)_{0})_{B} > ((ν)_{0})_{C} .

∴

a is not possible.
Options (iii) and (iv) are not possible, since the graphs are not parallel.

Q. The work functions of three metals A,B and C are WA​,WB​ and WC​ respectively. They are in decreasing order. The correct graph between kinetic energy and frequency ν of incident radiation is

Irrespective of the photosensitive material used, the slope of each line should be same, since slope =eh​ Since, WA​>WB​>WC​⇒((ν)0​)A​>((ν)0​)B​>((ν)0​)C​. ∴ a is not possible. Options (iii) and (iv) are not possible, since the graphs are not parallel.

Q. The work functions of three metals $A, B$ and $C$ are $W_{A}, W_{B}$ and $W_{C}$ respectively. They are in decreasing order. The correct graph between kinetic energy and frequency $ν$ of incident radiation is