A closed surface in vacuum encloses charges \( - q \) and \( + 3q \). Another charge \( - 2q \) lies out side the surface. The total electric flux over the surface is :

The magnetic susceptibility of the material of a rod is 499. Permeability of vacuum is \( 4\pi \times 10^{-7} \text{ H/m} \). The absolute permeability of the material of the rod is:

Match List-I with List-II

List-I (Potential difference across the terminal of a battery)	List-II (Situations)
(A) V = E	(I) Cell is being charged
(B) V = 0	(II) The internal resistance of a cell is zero
(C) V = E - ir	(III) cell is short-circuited
(D) V = E + ir	(IV) current is being drawn from a cell

Choose the correct answer from the options given below :

A 400 pF capacitor is charged by a 200 V supply. It is then disconnected from the supply and is connected to another uncharged 400 pF capacitor. The electrostatic energy lost in the process is

The angle of minimum deviation of an equilateral prism is equal to its refracting angle. The refractive index of the material of the prism is :

A transformer has 4000 turns in primary and 100 turns in secondary coils. The primary coil in connected to a 240 V and secondary to a bulb of 1.2 \(\Omega\) resistance. The current in the bulb is :

A field of \( 2 \times 10^{3} \text{ A/m} \) produces a flux of \( 2.4 \times 10^{-5} \text{ Wb} \) in an iron bar having area of cross-section \( 0.2 \text{ cm}^2 \). The relative permeability of medium is:

A metal wire under constant potential difference, when heated, shows that the drift velocity of the electron :

Read the passage carefully and answer the questions based on the passage:
Pollen pistil interaction involves all events from the landing of pollen grains on the stigma until the pollen tube enters the embryo sac (when the pollen is compatible). When a pollen tube grows through the style and enters into the ovules, it finally discharges two male gametes in one of the synergids. Syngamy and triple fusion are two fusion events occur in angiosperms. Thus, angiosperms exhibit double fertilization. The products of these fusions are the diploid zygote and triploid primary endosperm nucleus. Zygote develops into embryo and primary endosperm cell forms the endosperm tissue. The developing embryo passes through different stages before maturation.
The coconut water from tender coconut, a good source of nutrition is nothing but:

The value of \(\left|\begin{array}{lll}2^x & 1 & 6^x \\ 4^x & 1 & 3^x \\ 2^x & 1 & 6^x\end{array}\right|\), where \(x \neq 0 ;\) is:

The point which does not lie in the half plane \(2 x+3 y-12 \leq 0\) is:

Which is the correct decreasing order of boiling point
A. 1 - Bromoethane
B. 1 - Bromopentane
C. 1 - Bromobenzene
D. 1 - Bromopropane
Choose the correct answer from the options given below:

If \(A\) is square matrix of order \(3 \times 3\) and \(|\operatorname{adj} A|=64\), then the value of \(|5 A|\) is