Consider an infinite geometric series with the first term a and common ratio r. If its sum is 4 and the second term is 3/4 then (a,r) has the value,
(a). (7/4,3/7)
(b). (2,3/8)
(c). (3/2,1/2)
(d). (3,1/4)
A small object of uniform density rolls up a curved surface with an initial velocity v.
It reaches up to a maximum height of
3v^2/4g
with respect to the initial position. The
object is
(A) ring (B) solid sphere
(C) hollow sphere (D) disc
For gaseous state, if most probable speed is
denoted by C*, average speed by C and mean
square speed by C, then for a large number of
molecules the ratios of these speeds are -
Oxidation states of the metal in the minerals haematite and magnetite, respectively, are
(A) II, III in haematite and III in magnetite (B) II, III in haematite and II in magnetite
(C) II in haematite and II, III in magnetite (D) III in haematite and II, III in magnetite
The largest wavelength in the ultraviolet region of the hydrogen spectrum is 122 nm. The smallest wavelength in the
infrared region of the hydrogen spectrum (to the nearest integer) is
(A) 802 nm (B) 823 nm
(C) 1882 nm (D) 1648 nm