The total charge of an electric dipole is (Where 'q' is the point charge on either side of the dipole and 'e' is the charge of an electron)

Choose a vector quantity from the following:

Four point charges -2Q, +q, -2q and +Q are placed at four corners of a square A, B, C and D, respectively, as shown in the figure and OA = OB = \( a/\sqrt{2} \). If the potential at the center of a square is zero, what is the relation between Q and q?

Choose the correct statements:
A. Diamagnetic substances have non zero resultant magnetic moment.
B. The magnetisation of a paramagnetic material is inversely proportional to the absolute temperature T.
C. At high enough temperature, a ferromagnet becomes a paramagnet.
D. Magnetic permeability of ferromagnets, \(u \gg 1\)
E. Susceptibility of Diamagnetic, \(X \gg 1\)

Monochromatic lights of wavelengths \( 620 \text{ nm} \) and \( 626 \text{ nm} \), respectively are used to study diffraction at a single slit of aperture \( 0.7 \text{ mm} \). The distance between the slit and the screen is \( 1.8 \text{ m} \). The separation between the positions of the first maxima of the diffraction pattern obtained in the two cases is :

Young's double slit experiment is performed using a source of white light.
A. The center fringe will be white.
B. The fringe next to the center fringe will be violet.
C. The fringe next to the center fringe will be red.
D. There will be no completely dark fringe.
E. The center fringe will be of no colour.
Choose the correct answer from the options given below:

The resistivity of a wire depends on :
(A) its length
(B) its area of cross-section
(C) its temperature
(D) nature of material
(E) voltage applied across it
Choose the correct answer from the options given below :

Consider the LPP: Minimize \(Z=x+2 y\) subject to \(2 x+y \geq 3, x+2 y \geq 6, x, y \geq 0\). The optimal feasible solution occurs at:

Read the passage carefully and give the answers to the question :
India was amongst the first countries in the world to initiate action plans and programmes at a national level to attain total reproductive health as a social goal.
These programmes called 'family planning' were initiated in 1951 and were periodically assessed over the past decades. Improved programmes covering wider reproduction-related areas are currently in operation. Creating awareness among the people about various reproduction-related aspects and providing facilities and support for building up a reproductively healthy society are the major tasks under these programmes.
Which of the following statements is incorrect with respect to Medical Termination of Pregnancy?

Arrange the given structures in correct sequence of spermatogenesis?
(A) Spermatozoa
(B) Secondary spermatocytes
(C) Spermatogonia
(D) Spermatids
Choose the correct answer from the options given below:

Which one of the following hormones is produced only during pregnancy?

The technique shown in the picture is used to:

Identify the incorrect statement about the \(H _2- O _2\) fuel cell from the following: