The anode voltage of a photocell is kept fixed. The wavelength λ of the light falling on the cathode is gradually changed. The plate current I of the photocell varies as follows:
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Let y(x) be the solution of the differential equation (xlogx)dxdy+y=2xlogx,(x≥1) Then y(e) is equal to :
Which of the following compounds is not an antacid ?
In a hydrogen like atom electron makes transition from an energy level with quantum number n to another with quantum number (n - 1). If n>>1, the frequency of radiation emitted is proportional to
If the lines 1x−2=1y−3=−kx−4 and kx−1=2y−4=1x−5are coplanar, then k can have
The molecular formula of a commercial resin used for exchanging ions in water softening is C8H7SO3Na (Mol. Wt. 206). What would be the maximum uptake of Ca2+ ions by the resin when expressed in mole per gram resin ?
Let a and b be the roots of equation px2+qx+r=0,p=0.. If p, q, r are in A.P. and α1+β1=4, then the value of ∣α−β∣ is
The intermolecular interaction that is dependent on the inverse cube of distance between the molecule is :
A sonometer wire of length 1.5 m is made of steel. The tension in it produces an elastic strain of 1 %. What is the fundamental frequency of steel if density and elasticity of steel are 7.7×103kg/m3and2.2×1011N/m2 respectively?