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A millivoltmeter of $25 \text{ mV}$ range is to be converted into an ammeter of $25 \text{ A}$ range. The value (in ohm) of necessary shunt will be:
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:
A closely packed coil having 1000 turns has an average radius of 62.8 cm. If the current carried by the wire of the coil is 1 A, the value of the magnetic field produced at the centre of the coil will be nearly: (permeability of free space = $4\pi \times 10^{-7}$ H/m)
The enzyme enterokinase helps in conversion of
A long straight wire of length $2 \text{ m}$ and mass $250 \text{ g}$ is suspended horizontally in a uniform horizontal magnetic field of $0.7 \text{ T}$. The amount of current flowing through the wire will be: ($g=9.8 \text{ m s}^{-2}$)
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)
Identify the correct statement with regard to $G_1$ phase (Gap 1) of interphase.
The magnetic field on the axis of a circular loop of radius 100 cm carrying current I = √2 A, at a point 1 m away from the centre of the loop is given by:
A very long conducting wire is bent in a semi-circular shape from A to B as shown in the figure. The magnetic field at the point P for steady current configuration is given by:
Which of the following is not an inhibitory substance governing seed dormancy?
In forward biasing of the p-n junction:
Identify the equivalent logic gate represented by the circuit given below:
In the nuclear decay given below: $$ _{Z}^{A}X \rightarrow _{Z+1}^{A}Y \rightarrow _{Z-1}^{A-4}B^* \rightarrow _{Z-1}^{A-4}B $$ The particles emitted in the sequence are:
Which of the following statements is true for nuclear forces?
Two nuclei have their mass numbers in the ratio of 1:3. The ratio of their nuclear densities would be:
The rate of radioactive disintegration at an instant for a radioactive sample of half-life $2.2 \times 10^9 \text{ s}$ is $10^{10} \text{ s}^{-1}$. The number of radioactive atoms in that sample at that instant is:
What is the radius of iodine atom? (atomic no. 53, mass no. 126)
The 2-chlorobutane obtained by chlorination of n-butane will be: