Dual Nature of Matter and Radiation-Photoelectric Effect (KVPY Stream SB-SX (Class 12 & 1st Year BSC) Physics): Questions 1 - 3 of 9

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 250 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 200.00 or

Question number: 1

» Dual Nature of Matter and Radiation » Photoelectric Effect

Appeared in Year: 2013

MCQ▾

Question

In a photocell circuit the stopping potential, V0, is a measure of the maximum kinetic energy of the photoelectrons. The following graph shows experimentally measured values of stopping potential versus frequency ν of incident light.

Graph of stopping potential verses frequency

Graph of Stopping Potential Verses Frequency

In figure graph of stopping potential verses frequency is shown.

The values of Plank’s constant and the work function as determined from the graph are (taking the magnitude of electronic charge to be e = 1.6 × 10– 19 C)

Choices

Choice (4) Response
a.

6.0×1034Js,3.2eV

b.

6.4×1034Js,2.0eV

c.

6.4×1034Js,3.2eV

d.

6.0×1034Js,2.5eV

Question number: 2

» Dual Nature of Matter and Radiation » Photoelectric Effect

Appeared in Year: 2014

MCQ▾

Question

When ultraviolet radiation of a certain frequency falls on a potassium target, the photoelectrons released can be stopped completely by a retarding potential of 0.6 V. If the frequency of the radiation is increased by 10%, this stopping potential rises to 0.9 V. The work function of potassium is

Choices

Choice (4) Response
a.

2.0 eV

b.

2.8 eV

c.

3.0 eV

d.

2.4 eV

Question number: 3

» Dual Nature of Matter and Radiation » Photoelectric Effect

MCQ▾

Question

If the wavelength of photon emitted due to transition of electron from fourth orbit to second orbit in a hydrogen atom is λ, then the wavelength of photon emitted due to transition of electron from fifth orbit to third orbit will be –

Choices

Choice (4) Response
a.

2253λ

b.

275125λ

c.

675256λ

d.

200275λ

Sign In