In a historical experiment to determine Planck's constant, a metal surface was irradiated with light of different wavelengths. The emitted photoelectron energies were measured by applying a stopping potential. The relevant data for the wavelength (\lambda) of incident light and the corresponding stopping potential (V_0) are given below : \lambda(\mum) V_0\text{(Volt)} 0.3 2.0 0.4 1.0 0.5 0.4 Given that c = 3 \times 10^8 ms^{–1}and e = 1.6 \times 10^{–19} C, Planck's constant (in units of J s) found from such an experiment is) [JEE Adv 2016 P1]

Correct Answer is : 6.4×10−34

JEE Advanced 2016 Paper 1

Section: Physics

Question : 2 of 54

Marks: +1, -0

In a historical experiment to determine Planck's constant, a metal surface was irradiated with light of different wavelengths. The emitted photoelectron energies were measured by applying a stopping potential. The relevant data for the wavelength (λ) of incident light and the corresponding stopping potential (V0) are given below :

λ(μm)	V0(Volt)
0.3	2.0
0.4	1.0
0.5	0.4

Given that c=3×108ms–1and e=1.6×10–19C, Planck's constant (in units of J s) found from such an experiment is)

[JEE Adv 2016 P1]

6.0×10−34
6.4×10−34
6.6×10−34
6.8×10−34

Validate

Go to Question:

Prev Question

Next Question