KVPY Stream SBSX (Class 12 & 1st Year B.Sc.) Physics: Questions 20  22 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 exampattern and syllabus changes. View Sample Explanation or View Features.
Rs. 200.00 or
Question number: 20
» Kinematics » Uniform and NonUniform Motion
Appeared in Year: 2010
Question
A ball is dropped vertically from a height of h onto a hard surface. If the ball rebounds from the surface with a fraction r of the speed with which it strikes the latter on each impact, what is the net distance traveled by the ball up to the 10^{th} impact?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 21
» Thermodynamics » Measurement of Temperature
Appeared in Year: 2011
Question
Two rods, one made of copper and the other steel of the same length and cross sectional area are joined together. (The thermal conductivity of copper is 385 J s^{–1} m ^{–1} K^{1} and steel is 50 J s^{–1} m^{ –1}K^{–1}) If the copper end is held at 100^{0}C and the steel end is held at 0^{0}C, what is the junction temperature (assuming no other heat losses)?
Choices
Choice (4)  Response  

a.  88^{0}C 

b.  12^{0}C 

c.  50^{0}C 

d.  73^{0}C 

Question number: 22
» Gravitation » Universal Law of Gravitation
Appeared in Year: 2010
Question
A certain planet completes one rotation about its axis in time T. The weight of an object placed at the equator on the planet’s surface is a fraction f (f is close to unity) of its weight recorded at a latitude of 60^{0}. The density of the planet assumed to be a uniform perfect sphere is given by –
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

