MCQ
An infinitely long, straight conductor AB is fixed and a current is passed through it. Another movable straight wire CD of finite length and carrying current is held perpendicular to it and released. Neglect weight of the wire
  • A
    The rod CD will move upwards parallel to itself
  • B
    The rod CD will move downward parallel to itself
  • The rod CD will move upward and turn clockwise at the same time
  • D
    The rod CD will move upward and turn anti –clockwise at the same time

Answer

Correct option: C.
The rod CD will move upward and turn clockwise at the same time
(c) The rod CD will move upward and turn clockwise at the same time

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 balls of same mass and carrying equal charge are hung from a fixed support of length $l$. At electrostatic equilibrium, assuming that angles made by each thread is small, the separation, $x$ between the balls is proportional to
In Young's double slit experiment, two slits $S_1$ and $S_2$ are ' $d$ ' distance apart and the separation from slits to screen is $D$ (as shown in figure). Now if two transparent slabs of equal thickness $0.1\,mm$ but refractive index $1.51$ and $1.55$ are introduced in the path of beam $(\lambda=4000 \mathring A)$ from $S_1$ and $S_2$ respectively. The central bright fringe spot will shift by  $..........$ number of fringes.
The time period of a vibration magnetometer is $T_0$. Its magnet is replaced by another magnet whose moment of inertia is 3 times and magnetic moment is 1/3 of the initial magnet. The time period now will be
The specific resistance of a wire is $\rho $, its volume is $3\,{m^3}$ and its resistance is $3\, ohms$, then its length will be
Four lenses of focal length $\pm 15\; cm$ and $\pm 150 \;cm$ are available for making a telescope. To produce the largest magnification, the focal length(in $cm$) of the eyepiece should be 
$\gamma$-decay occurs when
In the following arrangement $y = 1.0\ mm$, $d= 0.24\ mm$ and $D = 1.2\ m$. The work function of the material of the emitter is $2.2\ eV.$ The stopping potential $V$ needed to stop the photo current will be .............. $V$
The electric field intensity at $P$ and $Q$, in the shown arrangement, are in the ratio
A parallel-plate capacitor consists of a fixed plate and a movable plate that is allowed to slide in the direction parallel to the plates. Let $x$ be the distance of overlap, as shown in the figure. The separation between the plates is fixed. Assume that the plates are electrically isolated, so that their charges $±Q$ are constant. Force on the movable plate is proportional to 
The central fringe of the interference pattern produced by light of wavelength $6000 \mathring A$ is found to shift to the position of $4^{\text {th}}$ bright fringe after a glass plate of refractive index $1.5$ is introduced in front of one slit in Young's experiment. The thickness of the glass plate will be ......... $\mu m$