Work, Energy and Power (KVPY Stream SBSX (Class 12 & 1st Year BSC) Physics): Questions 1  3 of 19
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Question number: 1
» Work, Energy and Power » WorkEnergy Theorem
Appeared in Year: 2011
Question
Two plates each of the mass m are connected by a massless spring as shown.
A weight W is put on the upper plate which compresses the spring further. When W is removed, the entire assembly jumps up. The minimum weight W needed for the assembly to jump up when the weight is removed is just more than –
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 2
» Work, Energy and Power » Conservation of Mechanical Energy
Appeared in Year: 2010
Question
Two identical particles of mass ‘m’ and charge q are shot at each other from a very great distance with an initial speed v. The distance of closest approach of these charges is –
Choices
Choice (4)  Response  

a.  0  
b. 
 
c. 
 
d. 

Question number: 3
» Work, Energy and Power » WorkEnergy Theorem
Appeared in Year: 2012
Question
In one model of the election, the mass of electron m_{e} is thought to be a uniformly charged shell of radius R and total charge e, whose electrostatic energy E is equivalent to its mass m_{e} via Einstein’s mass energy relation E = m_{e}c^{2}. In this model, R is approximately – (m_{e} = 9.1 × 10^{31}kg, c = 3 × 10^{8} ms^{1}, magnitude of the electron charge = 1.6 × 10^{19} C)
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 
