MCQ
Magnitude of pursuit velocity does not depend on :
  • A
    cross-section of the wire
  • length of the wire
  • C
    the number of free electrons
  • D
    magnitude of current

Answer

Correct option: B.
length of the wire

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Two point source separated by $d = 5\, \mu m$ emit light of wavelength $\lambda = 2\, \mu m$ in phase.Acircular wire of radius $20\, \mu m$ is placed around the source as shown in figure.
A parallel monochromatic beam of light is incident normally on a narrow slit. A diffraction pattern is formed on a screen placed perpendicular to the direction of incident beam. At the first maximum of the diffraction pattern the phase difference between the rays coming from the edges of the slit is
An optical arrangement consists of two concave mirrors $M_1$ and $M_2$, and a convex lens $L$ with a common principal axis, as shown in the figure. The focal length of $L$ is $10 \mathrm{~cm}$. The radii of curvature of $M_1$ and $M_2$ are $20 \mathrm{~cm}$ and $24 \mathrm{~cm}$, respectively. The distance between $\mathrm{L}$ and $M_2$ is $20 \mathrm{~cm}$. A point object $S$ is placed at the mid-point between $L$ and $M_2$ on the axis. When the distance between $\mathrm{L}$ and $M_1$ is $n / 7 \mathrm{~cm}$, one of the images coincides with $S$. The value of $n$ is. . . . 
An equiconvex lens has power $\mathrm{P}$. It is cut into two symmetrical halves by a plane containing the principal axis The power of one part will be
A light wave is incident normally on a glass slab of refractive index $1.5$. If $4\%$ of light gets reflected and the amplitude of the electric field of the incident light is $30\, V/m$, then the amplitude of the electric field for the wave propagating in the glass medium will be.......$ V/m$
Assertion : The number of electrons in a P-type silicon semiconductor is less than the number of electrons in a pure silicon semiconductor at room temperature.
Reason : It is due to law of mass action.
Work done in moving a positive charge on an equipotential surface is
In the given figure, when galvanometer shows no deflection, the current (in ampere) flowing through 5Ω resistance will be

In hydrogen and hydrogen like atoms, the ratio of difference of energies $E_{4n}-E_{2n}$ and $E_{2n}-E_{n}$ varies with its atomic number $z$ and $n$ as:
$A$ fish is near the centre of a spherical water filled $( \mu = 4/3)$ fish bowl. $A$ child stands in air at a distance $2R$ ($R$ is the radius of curvature of the sphere) from the centre of the bowl. At what distance from the centre would the child nose appear to the fish situated at the centre :