A heating element is marked \( V = 210 \text{ V, } P = 630 \text{ W} \). The resistance of the element (R) would be

The ratio of nucleus density of nitrogen nucleus (\( {}^{14}_7\text{N} \)) to the nucleus density of oxygen nucleus (\( {}^{16}_8\text{O} \)) will be :

Which of the following is an incorrect statement?

If the mass of a proton is \( m_p = 1.007825 \text{ u} \) and the mass of the neutron is \( m_n = 1.008665 \text{ u} \), the mass defect in the formation of \( {}_{3}^{7}\text{Li} \) nucleus is: (take the mass of Lithium nucleus as \( M_{Li} = 7.000000 \text{ u} \))

The electrical conductivity of a semiconductor increases when electromagnetic radiation of wavelength shorter than 2480 nm is incident on it. The band gap for the semiconductor is :

Two parallel conductors each carrying a current of 10 mA in opposite directions are placed at a distance 10 cm apart. The force per unit length between two conductors is

During transmission of electrical energy by transformer, near the consumer

Observe the given figures and answer the question

Match List - I with List - II.

List - I	List - II
(A) Part/Compound/Gases	(I) C
(B) Electrodes	(II) B
(C) Water which contains organic compounds	(III) D
(D) Gases	(IV) E

Choose the correct answer from the options given below:

Read the following paragraph carefully and answer the given questions.
In the year 1963 the two enzymes responsible for restricting the growth of bacteriophage in E. coli were isolated. The first restriction endonuclease - Hind II, whose functioning depended on a specific DNA nucleotide sequence was characterized five years later. It was found that Hind II always cut DNA molecules at a particular point by recognizing a specific sequence of six base pairs. This specific base sequence is known as the recognition sequence for Hind II. Besides Hind II, today we know more than 900 restriction enzymes that have been isolated from over 230 strains of bacteria, each of which recognize different recognition sequences.
DNA fragments can be separated by a technique known as:

Conditions for obtaining a interference pattern of light are
(A) Two waves should be coherent
(B) The distance of the screen from the slits should be small
(C) The separation between slits should be small
(D) Two coherent waves should have nearly the same amplitude
Choose the correct answer from the options given below:

A bar magnet is cut into two equal halves along a plane parallel to the magnetic axis. The one parameter which remains unchanged is

Biofertilizers enrich the nutrient quality of the soil. Which of the following is not a source of biofertilizer?

Rahul invested ₹ 20000 in a mutual fund in year 2018. If the value of mutual fund increased to ₹ 32000 in year 2023, then the compound annual growth rate of his investment is : [given that \((1.6)^{\frac{1}{5}}=1.098\) ]