KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics: Questions 134 - 137 of 268

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 268 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: 134

» 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: 135

» Thermodynamics » Measurement of Temperature

MCQ▾

Question

Two rods, one made of Aluminum and the other copper of the same length and across sectional area are joined together. (The thermal conductivity of copper is and aluminum is ). If the copper end is held at 1300 C and the aluminum end is held at 50 C, what is the junction temperature (assuming no other heat losses)?

Choices

Choice (4) Response

a.

55.60 C

b.

86.60 C

c.

1000 C

d.

88.70 C

Question number: 136

» Physics and Measurement » Dimensions of Physical Quantities

Appeared in Year: 2015

MCQ▾

Question

The dimension of the area A of a black hole can be written in terms of the universal gravitational constant G, its mass M and the speed of light c as . Here,

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 137

» Kinematics » Uniform and Non-Uniform Motion

Appeared in Year: 2013

MCQ▾

Question

A solid sphere rolls without slipping, first horizontal and then up to a point X at height h on an inclined plane before rolling down, as shown.

A solid sphere rolls without slipping

A Solid Sphere Rolls Without Slipping

In figure a solid sphere rolls without slipping, first horizontal and then up to a point X at height h on a inclined plane before rolling down.

The initial horizontal speed of the sphere is

Choices

Choice (4) Response

a.

b.

c.

d.

f Page
Sign In