Q1.A wind-powered generator converts wind energy into electric energy. Assume that the generator converts a fixed fraction of the wind energy intercepted by its blades into electrical energy. For wind speed v, the electrical power output will be proportional to
Answer : Option CExplaination / Solution: No Explaination.
Q2.Two equal masses m1 and m2
are moving along the same straight line with velocities 5ms-1 and -9ms-1
respectively. If the collision is elastic, then calculate the velocities after
the collision of m1 and m2, respectively
Answer : Option CExplaination / Solution: No Explaination.
Q3.A particle is placed at the origin and a force F=kx
is acting on it (where k is a positive
constant). If U(0)=0, the graph of U(x) versus x will be (where U is the
potential energy function)
Answer : Option CExplaination / Solution: No Explaination.
A particle which is constrained to move
along x-axis, is subjected to a force in the same direction which varies with
the distance x of the particle from the origin as F(x) =-kx+ax3.
Here, k and a are positive
constants. For x ≥ 0, the functional form of the potential energy U(x) of the
particle is
Answer : Option DExplaination / Solution: No Explaination.
Q5.A spring of force constant k is cut into two pieces such that one piece is double the length of the other. Then, the long piece will have a force constant of
Answer : Option BExplaination / Solution: No Explaination.
Total Question/Mark :
Scored Mark :
Mark for Correct Answer : 1
Mark for Wrong Answer : -0.5
Mark for Left Answer : 0