Question Bank Directory

Select the correct match: (1) Haemophilia - Y linked (2) Phenylketonuria - Autosomal dominant trait (3) Sickle cell anaemia - Autosomal recessive trait, chromosome-11 (4) Thalassemia - X linked

A particle mass m, charge Q, and kinetic energy T enter a transverse uniform magnetic field of induction $\vec{B}$. After 3 sec the kinetic energy of the particle will be:

Identify the substances having glycosidic bond and peptide bond, respectively in their structure:

A closed-loop PQRS carrying a current is placed in a uniform magnetic field. If the magnetic forces on segments PS, SR and RO (RQ) are $F_1$, $F_2$ and $F_3$ respectively and are in the plane of the paper and along with the directions shown, the force on the segment QP is

In order to pass 10% of the main current through a moving coil galvanometer of 99 ohms, the resistance of the required shunt is:

The resistance of an ideal voltmeter is:

A galvanometer having a resistance of $8\ \Omega$ is shunted by a wire of resistance $2\ \Omega$. If the total current is $1\ \text{A}$, the part of it passing through the shunt will be:

If an ammeter A reads 2 A and the voltmeter V reads 20 V, what is the value of resistance R? (Assuming finite resistances of ammeter and voltmeter)

A voltmeter has a range $V$ with a series resistance $R$. With a series resistance $2R$, the range is $V'$. The correct relation between $V$ and $V'$ is:

The current flowing in a coil of resistance $90~\Omega$ is to be reduced by $90\%$. What value of resistance should be connected in parallel with it?

A galvanometer of $50~\Omega$ resistance has 25 divisions. A current of $4 \times 10^{-4} \text{ A}$ gives a deflection of one division. To convert this galvanometer into a voltmeter having a range of $25 \text{ V}$, it should be connected with a resistance of:

When a charged particle with velocity $\vec{v}$ is subjected to an induction magnetic field $\vec{B}$, the force on it is non-zero. What does this imply?

A long wire carrying a steady current is bent into a circular loop of one turn. The magnetic field at the center of the loop is $B$. It is then bent into a circular coil of $n$ turns. The magnetic field at the centre of this coil of $n$ turns will be:

The radius of a nucleus of a mass number $A$ is directly proportional to:

In the product $\vec{F} = q(\vec{v} \times \vec{B}) = q\vec{v} \times (B\hat{i} + B\hat{j} + B_0\hat{k})$. For $q=1$ and $\vec{v} = 2\hat{i} + 4\hat{j} + 6\hat{k}$ and $\vec{F} = 4\hat{i} - 20\hat{j} + 12\hat{k}$, what will be the complete expression for $\vec{B}$?

The shape of the magnetic field lines due to an infinite long, straight current carrying conductor is:

An alternating electric field of frequency $v$ is applied across the dees (radius = $R$) of a cyclotron that is being used to accelerate protons (mass = $m$). The operating magnetic field used in the cyclotron and the kinetic energy ($K$) of the proton beam, produced by it, are given by:

A strong magnetic field is applied along the direction of the velocity of an electron. The electron would move along:

The enzyme enterokinase helps in conversion of

Two very long, straight, parallel conductors A and B carry current of 5 A and 10 A respectively and are at a distance of 10 cm from each other. The direction of the current in the two conductors is the same. The force acting per unit length between two conductors is: ($\mu_0=4\pi \times 10^{-7}$ SI unit)