For a long wire carrying a current of \( 10 \text{ A} \), the magnitude of magnetic field at a point \( 4 \text{ cm} \) away from it will be :

Two Polaroids are placed in such a way that their axes make an angle of 60° with each other. If an unpolarized light is incident on a system of these Polaroids, the fraction of transmitted light to the incident light will be

The electric potential due to an electric dipole
(A) depends on r, where r is the magnitude of position vector \( \vec{r} \)
(B) depends on the angle between the position vector \( \vec{r} \) and the dipole moment vector \( \vec{p} \)
(C) falls off at long distances, as \( 1/r^2 \)
(D) does not depend upon the distance separating the charges
Choose the correct answer from the options given below:

Which of the following frequency would be suitable for the beyond the horizon communication using sky waves?

Let \( i_E, i_C \) and \( i_B \) represent the emitter current, collector current and base current respectively in a transistor. Choose the correct statement from the following:

Ferro-magnetic materials used in transformer core must have :

A moving charge produces :

A person has invested Rs. 20,000 in 2020 for 5 years.
If the CAGR for his investment is 11.84%, the end balance of his investment is [Given \((1.1184)^5=1.7498\) ]

The value of \(\left|\begin{array}{cc}a+i b & c+i d \\ -c+i d & a-i b\end{array}\right|\) is:

A solenoid of length 30 cm and 3000 turns carries a current of 10 A. The value of the magnetic field (\( \vec{B} \)) at the centre of solenoid is: (Given \( \mu_0 = 4\pi \times 10^{-7} \text{ Wb/A-m} \))

For a given photosensitive material, the stopping potential \( V_0 \) varies with the frequency of incident radiation as

Wavelength of matter wave is independent of :

Read the passage and answer the question : There are thousands of varieties of rice in India alone. The diversity of rice in India is one of the richest in the world. Basmati rice is distinct for its unique aroma and flavour and 27 documented varieties of Basmati are grown in India. There is reference to Basmati in ancient texts, folklore and poetry, as it has been grown for centuries. Several attempts have also been made to patent uses, products and processes based on Indian traditional herbal medicine, e.g. turmeric, neem. There has been growing realisation of the injustice, inadequate compensation and benefit sharing between developed and developing countries. The Indian Parliament has recently cleared a Bill that takes such issues into consideration, including patent terms emergency provisions and research and development initiative.
One of the classical example of biopatent controversy is of -