A biconvex lens has radii of curvature of 10 cm each. If the refractive index of the material of the lens is 1.5, what will be its focal length in air ?

If a p-n junction is forward biased, then what is the direction of diffusion and drift current across the junction?

A planoconvex lens has the radius of curvature of its curved surface 50 cm and the refractive index of its material is 1.5. Its focal length will be

The element having the highest binding energy per nucleon among the following is :

In the experimental arrangement for study of photoelectric effect given below, P, Q, R and S, respectively are:

(A) Commutator
(B) Evacuated Glass Tube
(C) Photosensitive Plate
(D) Quartz Window

The energy of a photon is equal to the kinetic energy of a proton. The energy of the photon is E. Let \(\lambda_1\) be the de-Broglie wavelength of the proton and \(\lambda_2\) be the wavelength of the photon. The ratio \(\lambda_1/\lambda_2\) is proportional to the following

When a convex lens of glass is immersed in water, its power will

If \(y=\sin x+e^x\), then \(\frac{d^2 x}{d y^2}\) is equal to:

Which of the following alkyl halide will undergo \(S_N1\) reaction most readily :

Which of the following functions is onto?

The domain of \(y = \cos^{-1}(x^2 - 4)\) is:

Two long parallel wires separated by a distance of 2.50 cm, repel each other with a force of \( 4 \times 10^{-5} \text{ N/m} \). The current in one wire is 0.5 A. The current in the second wire will be

Read the passage carefully and answer the questions
Carbohydrates are naturally formed organic compounds from various plants. The common chemical formula, \(C _x\left( H _2 O \right)_y\), was considered as hydrates of carbon to derive the various carbohydrates. For instance, the general formula for glucose ( \(C _6 H _{12} O _6\) ) easily fits into the above formula. Carbohydrates also called saccharides are classified on the basis of their behavior towards hydrolysis. Monosaccharides cannot be hydrolyzed further to simpler units of polyhydroxy aldehyde or ketones. About 20 monosaccharides are known to occur in nature. Carbohydrates that yield large number of monosaccharide units are called polysaccharides. Amino acids contain ( \(- NH _2\) ) and ( - COOH ), which can be classified in various forms. Proteins are polymers of alpha amino acids which are connected to each other by a peptide bond or peptide linkage. When a native protein is subjected to physical change, its globules unfold and helix get uncoiled and the protein loses its biological activity. The protein is said to be denaturated.
Which of the following statements is incorrect for Lactose ?