Which of the following element has highest binding energy per nucleon ?

The following table gives the lenght, diameter and appiled potential difference of four copper wires, A, B, C, D, across their ends. Arrange the wires in correct order of the increasing electric field.

Wire	Length	Diameter	Potential difference
(A) Wire A	l	3d	V
(B) Wire B	2l	d	V
(C) Wire C	3l	2d	2V
(D) Wire D	3l	2d	V

Choose the correct answer from the options given below:

A charge \( 1.2 \times 10^{-8} \text{ C} \) is uniformly distributed on the conducting sphere of radius 5 cm. The magnitude of the electric field at the centre of the conducting sphere is

If the 8th bright band of wavelength \( \lambda_1 \) coincides with 9th bright band of wavelength \( \lambda_2 \) in a Young's double slits experiment then the possible wavelength of two lights are :

The cause of the depletion layer in the p-n junction region is

A semiconductor device is connected in series circuit with a battery and resistance. A current is found to pass through the circuit. If the polarity of the battery is reversed, the current drops at almost zero. The device may be

During transmission of electrical energy by transformer, near the consumer

The IUPAC name of the following compound is:

Which of the following biofertilisers are free living in the soil?
(A) Anabaena
(B) Azospirillum
(C) Rhizobium
(D) Azotobacter

The adaptive radiation is represented by which of the following?
(A) Darwin's finches
(B) Koala and Wombat
(C) Tiger cat and Sugar glider
(D) Spotted cuscus and lemur
(E) Anteater and Numbat
Choose the correct answer from the options given below :

Read the passage carefully and give the answers to the question .
India was amongst the first countries in the world to initiate action plans 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 methods of contraception is not meant for females?

The unit's digit of \(13^{13}\) is :

The function of the soft iron core in the moving coil galvanometer is: