AIEEE Exam

A bead of mass 'm' is attached to one end of a
spring of natural length R and spring constant
k =
R
( 3 +1)mg . The other end of the spring is
fixed at point A on a smooth vertical ring of
radius R as shown. The normal reaction at B just
after it is released to move is

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AIEEE Other Question

the switch S is initially
open, and the capacitor C is charged with the
polarity indicated. The switch is then closed, and
the capacitor begins discharging through the
resistor. Which of the following is true of the
current that is subsequently induced in the circular
wire loop near the long, straight wire AB ?
(A) It is counterclockwise and increases with time
(B) It is counterclockwise and decreases with time
(C) It is clockwise and increases with time
(D) It is clockwise and decreases with time Imagine an atom made up of proton and a
hypothetical particle of double the mass of the
electron but having the same charge as the
electron. Apply the Bohr atom model and consider
all possible transitions of this hypothetical particle
of the first excited level. The longest wavelength
photon that will be emitted has wavelength λ (in
terms of the Rydberg constant R for hydrogen
atom) equal to :
(A) 9/5R (B) 36/5R (C) 18/5R (D) 4/R