AIEEE Exam

A capacitor of capacitance C is charged to a
potential difference V from a cell and then
disconnected from it. A charge + Q is now given
to its positive plate. The potential difference across
the capacitor is now

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AIEEE Other Question

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
An electron with K.E = EeV collides with a
hydrogen atom in the ground state. The collision
will be elastic -
(A) for all values of E
(B) for E < 10.2 eV
(C) for E < 13.6 eV
(D) only for E < 3.4 eV