AIEEE Exam

A particle of mass m, initially at rest, is acted
upon by a variable force F for a brief interval of
time T. It begins to move with a velocity 'u' after
the force stops acting. F is shown in the graph as
a function of time. The curve is a semicircle,
then

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AIEEE Other Question

Substance A has a specific heat that is about 3.4
times that of substance B. A cube of A and a
cube of B, both of equal mass and at 20ºC, are
placed in two different Styrofoam cups, each
filled with 100g of water at 40ºC. The Styrofoam
cups have negligible heat capacities. After
equilibrium has been attained -
(A) The temperature of the B is lower than that
of the A
(B) The temperature of the B is higher than that
of the A
(C) The temperature of water in the two cups are
same
(D) (A) or (B) depending on how much mass is
involved
A spring-block system undergoes vertical oscillation
above a large horizontal metal sheet with uniform
positive charge. The time period of the oscillation
is T. If the block is given a charge Q, its time
period of oscillation will be
(A) T
(B) > T
(C) < T
(D) > T if Q is positive and < T if Q is negative