As the mass number A increases, which of the following quantities related to a nucleus does not change?

The work done in moving a point charge, \(2 \mu C\) between two points between which the potential difference is 50 V is:

The magnetisation at the centre of a bar magnet (magnetic length 10 cm), having pole strength 6.3 A m, and area of cross-section \(A = 0.70 \text{ cm}^2\) is

A charge q moving with velocity \( \vec{v} \) in a magnetic field \( \vec{B} \) experiences a force \( \vec{F} \). Which pair of quantities are mutually perpendicular?
A. \( \vec{F} \) & \( \vec{v} \)
B. \( \vec{F} \) & \( \vec{B} \)
C. \( \vec{v} \) & \( \vec{B} \)
Choose the correct answer from the options given below:

The force between the plates of a parallel plate capacitor of capacitance C, distance between plates d and potential difference V is:

Two charges \( 5 \mu C \) and \( - 2 \mu C \) (with no external field) are placed at \( (-9 \text{ cm}, 0, 0) \) and \( (9 \text{ cm}, 0, 0) \) respectively. The work required to separate the two charges infinitely away from each other is :

The block diagram of a transmitter will have in sequence.
(A) Power amplifier
(B) Amplitude modulator
(C) Message signal
(D) Square law device
(E) Transmitting antenna
Choose the correct answer from the options given below :

Three numbers are chosen at random without replacement from {1, 2, 3, 4, 5, 6, 7, 8}. The probability that their minimum is 3, (given that their maximum is 6)is:

Read the following paragraph carefully and answer the given questions.
Certain types of leukocytes (WBC) of our body like polymorpho-nuclear leukocytes (PMNL-neutrophils) and monocytes and natural killer (type of lymphocytes) in the blood as well as macrophages in tissues can phagocytose and destroy microbes. For determining the cause of allergy, the patient is exposed to or injected with very small doses of possible allergens, and the reactions studied. The use of drugs like anti-histamine, adrenalin and steroids quickly reduce the symptoms of allergy. Heroin, commonly called smack is chemically diacetylmorphine which is a white, odourless, bitter crystalline compound. This is obtained by acetylation of morphine. Techniques like radiography (use of X-rays), CT (computed tomography) and MRI (magnetic resonance imaging) are very useful to detect cancers of the internal organs. Different species of Plasmodium (P. vivax, P. malaria and P. falciparum) are responsible for different types of malaria. Of these, malignant malaria caused by Plasmodium falciparum is the most serious one and can even be fatal.
Which one of the following drugs can not quickly reduce the symptoms of allergy?

Match List - I with List - II. 

List – I	List – II
(A) SN1 reaction	(I) vic-dibromide
(B) Bromination of alkenes	(II) gem-dibromide
(C) Alkylidene halides	(III) Racemisation
(D) Dehydrohalogenation of haloalkanes	(IV) Saytzeff rule

Choose the correct answer from the options given below :

A straight wire of mass 200 g and length 1.5 m carries a current of 2 A. It is suspended in mid air by a uniform horizontal magnetic field B perpendicular to length of wire. The magnitude of B is ( \( g = 10 \text{ ms}^{-2} \) )

In which of the following transitions will the wavelength of light emitted be minimum?

Which Assisted Reproductive Technology (ART) is more suitable when the male partner has low sperm count?