class 12

Missing

JEE Main

The "N" which does not contribute to the basicity for the compound is :

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Let $a,b$and $c$ be three non-zero vectors such that no two of them are collinear and $(a×b)×c=31 ∣c∣∣∣ b∣∣ ∣a∣$. If $θ$is the angle between vectors $b$and $c$then a value of $sinθ$is :

Two capacitors \displaystyle{C}_{}

Two short bar magnets of length 1 cm each have magnetic moments $1.20Am_{2}and1.00Am_{2}$ respectively. They are placed on a horizontal table parallel to each other with their N poles pointing towards the South. They have a common magnetic equator and are separated by a distance of 20.0 cm. The value of the resultant horizontal magnetic induction at the mid - point O of the line joining their centres is close to (Horizontal component of earths magnetic induction is $3.6×10_{−5}Wb/m_{2})$

The molarity of a solution obtained by mixing 750 mL of 0.5 (M) HCl with 250 mL of 2(M)HCl will be:

The equation to the line touching both the parabolas $y_{2}=4x$ and $x_{2}=−32y$ is

A beam of unpolarised light of intensity $I_{0}$ is passed through a polaroid A and then through another polaroid B which is oriented so that its principal plane makes an angle of $45_{∘}$ relative to that of A. The intensity of the emergent light is:

Let $f_{K}(x)=k1 (s∈_{k}x+cos_{k}x)$where $x∈R$and $k≥1$. Then $f_{4}(x)−f_{6}(x)$equals

The area of the region described by $A={(x,y):x_{2}+y_{2}≤1$and $y_{2}≤1−x}$is