Which of the following is not based on total internal reflection?

An infinitely long straight conductor carries a current of 150 A. At what distance from the conductor is the magnetic field caused by the current equal to \( 10^{-4} \text{ T} \)?

In a parallel plate capacitor of capacitance C, a metal sheet is inserted between the plates parallel to them. If the thickness of the sheet is one third of the separation between the plates, the capacitance of the capacitor will be

In a Wheatstone bridge, the resistances \( R_1, R_2, R_3 \) and \( R_4 \) present in four arms are \( 10 \Omega, 30 \Omega, 30 \Omega \) and \( 90 \Omega \) respectively. If the galvanometer resistance is \( 50 \Omega \) and the voltage of the battery is 7 V and its internal resistance is \( 5 \Omega \), then the total current drawn from the battery is

A photoelectric surface is illuminated successively by monochrounstic light of wavelength \(\lambda\) and \(0.5 \lambda\). What will be the work function of the photosenaltive material of the marimum linetic energy of the photo electrons in the second case is 5 times that of the first case?

According to Bohr's Model :
(A) The radius is directly proportional to 'n'.
(B) The speed is directly proportional to \(\frac{1}{n} \) .
(C) The magnitude of total energy is directly proportional to \(\frac{1}{n^2} \).
(D) The radius is directly proportional to \(n^2\)

Identify the correct statements from the following in the context of electromagnetic waves.
(A) X-rays are not electromagnetic waves.
(B) Electromagnetic waves are transverse in nature.
(C) Electromagnetic waves can not be polarised.
(D) Electromagnetic waves travel with the speed of light in vacuum.
Choose the correct answer from the options given below:

Match List-I and List-II.

List-I	List-II
(A) Adenine	(I) Purine
(B) Thymine	(II) Pyrimidine
(C) Uracil	(III) RNA
(D) Deoxyribose	(IV) DNA

Choose the correct answer from the options given below :

Read the following passage carefully and answer the given questions.
Immune System in the Body
The human immune system consists of lymphoid organs, tissues, cells and soluble molecules like antibodies. The primary lymphoid organs are bone marrow and thymus where immature lymphocytes differentiate into antigen-sensitive lymphocytes. After maturation the lymphocytes migrate to secondary lymphoid organs like spleen, lymph nodes, tonsils, Peyer's patches of small intestine and appendix. The secondary lymphoid organs provide the sites for interaction of lymphocytes with the antigen, which then proliferate to become effector cells. The bone marrow is the main lymphoid organ where all blood cells including lymphocytes are produced. Each antibody molecule has four peptide chains, two small called light chains and two longer called heavy chains. Hence, an antibody is represented as H2L2. Different types of antibodies are produced in our body. IgA, IgM, IgE, IgG are some of them. Techniques like radiography (use of X-rays), CT (computed tomography) and MRI (magnetic resonance imaging) are very useful to detect cancers of the internal organs.
The site of interaction of lymphocytes with antigen is

Which of the following material takes longer time for decomposition?

What is the value of van't Hoff factor for complete dissociation of K2SO4 ?

The focal length of a converging lens is measured for violet, green, red and yellow colours. Arrange the focal length for different colours in increasing order.
(A) fv
(B) fg
(C) fr
(D) fy
Choose the correct answer from the options given below:

Which of the following is correct about the compound annual growth rate (CAGR)?