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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 $(xgx)dxdy +y=2xgx,(x≥1)$ 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−5 $are coplanar, then k can have

The molecular formula of a commercial resin used for exchanging ions in water softening is $C_{8}H_{7}SO_{3}Na$ (Mol. Wt. 206). What would be the maximum uptake of $Ca_{2+}$ ions by the resin when expressed in mole per gram resin ?

Let a and b be the roots of equation $px_{2}+qx+r=0,p=0.$. 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 $7.7×10_{3}kg/m_{3}and2.2×10_{11}N/m_{2}$ respectively?