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Galvanization is applying a coating of:

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The graph between angle of deviation $(δ)$ and angle of incidence (i) for a triangular prism is represented by:

This question has statement I and statement II. Of the four choices given after the statements, choose the one that best describes the two statements. Statement- I: Higher the range, greater is the resistance of ammeter. Statement- II: To increase the range of ammeter, additional shunt needs to be used across it.

Sodium metal crystallizes in a body centred cubic lattice with a unit cell edge of 4.29 Å. The radius of sodium atom is approximately :

The color of $KMnO_{4}$ is due to :

Diameter of plano-convex lens is 6 cm and thickness at the centre is 3 mm. If speed of light in material of lens is $2×10_{8}m/s,$ the focal length of the lens is :

If $X={4_{n}−3n−1:n∈N}andY={9(n−1):n∈N}$, where N is the set of natural numbers, then $X∪Y$is equal to

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?

A uniform cylinder of length L and mass M having cross-sectional area A is suspended, with its length vertical, from a fixed point by a massless spring, such that it is half submerged in a liquid of density $σ$ at equilibrium position. The extension $x_{0}$ of the spring when it is in equilibrium is: