A …… lens is used to correct myopia and a ….. lens is used to correct hypermetropia. A Concave, concave B Convex, convex C Convex, concave D Concave, convex
Rate of reaction of any substance depends on (A) active mass (B) molecular weight (C) atomic weight (D) equivalent weight
Formula of oleum is (A) $\mathrm{H}_{2} \mathrm{~S}_{2} \mathrm{O}_{7}$ (B) $\mathrm{H}_{2} \mathrm{SO}_{4}$ (C) $\mathrm{H}_{2} \mathrm{SO}_{3}$ (D) $\mathrm{H}_{2} \mathrm{SO}_{5}$
A line passes through the point (2, 1, -3) and is parallel to the vector Find the equations of the line in vector and Cartesian forms.
Two cells of emf $\varepsilon_{1}$ and $\varepsilon_{2}$, internal resistance $r_{1}$ and $r_{2}$, connected in parallel. The equivalent emf of the combination is- (A) $\frac{\varepsilon_{1} r_{1}+\varepsilon_{1} r_{1}}{r_{1}+r_{2}}$ (B) $\frac{\varepsilon_{1} r_{2}+\varepsilon_{2} r_{1}}{r_{1}+r_{2}}$ (C) $\sqrt{\varepsilon_{1} \times \varepsilon_{2}}$ (D) $\frac{\varepsilon_{1}+\varepsilon_{2}}{2}$
If $A(-2,0), B(0,4)$ and $C(0, k)$ be three points such that area of a $A B C$ is 4 sq units, find the value of $k$.
Find the value of $k$ for which the area of a ABC having vertices $A(2,-6), B(5,4)$ and $C(k, 4)$ is 35 sq units.
