Question
An electric potential difference will be induced between the ends of the conductor shown in the figure, if the conductor moves in the direction shown by:
✓
Answer
- M
Fleming’s Right Hand Rule gives the direction of current in the conductor whenever it is moved in any magnetic field. It states that if we stretch our right hand fingers perpendicular to each other as shown in fig, then if fore finger is in the direction of Magnetic field and thumb is in the direction of motion of conductor then middle finger gives the direction of current in the conductor.
Explanation for the correct answer:
For induction of emf in the conductor, the motion of conductor should be perpendicular to the direction of magnetic field. Thus, Option B and C are eliminated.
Now if we move conductor in P direction, the motion will be perpendicular to the direction of magnetic field but then the charge separation in the conductor will take place perpendicular to the length of the conductor. Thus, due to less space for charge separation emf can not be induced in the conductor. Thus, Option A is eliminated.
If conductor is moved in direction M then the charge separation in the conductor takes place across its length, there will be enough space for charge separation. And thus emf will be induced across the conductor.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
For the myopic eye, the defect is cured by
(a) Convex lens(b) Concave lens (c) Cylindrical lens(d) Toric lens
(a) Convex lens(b) Concave lens (c) Cylindrical lens(d) Toric lens
A particle moves with a constant velocity parallel to the X-axis. Its angular momentum with respect to the origin:
- Is zero.
- Remains constant.
- Goes on Increasing.
- Goes on decreasing.
The line of force in a magnetic field represents the direction at each point that a magnetic needle placed at the point takes up. Do they also represent the direction of the force on a moving charge at each point?
The following configuration of gate is equivalent to
The value of scattering angle of alpha particle for maximum value of impact parameter is :
A conducting disc of radius r spins about its axis with an angular velocity ω. There is a uniform magnetic field of magnetude B perpendicular to the plane of the disc. C is the centre of the ring.
The capacities and connection of five capacitors are shown in the adjoining figure. The potential difference between the points $A$ and $4$ is $60$ volts . Then the equivalent capacity between $A$ and $B$ and the charge on $5\ \mu F$ capacitance will be respectively
→A circular loop has a radius of $5\ cm$ and it is carrying a current of $0.1\ \ce{amp.}$ Its magnetic moment is
→A perpendicular material is place in a magnetic fields. Consider the following statemetns:
- If the magnetic field is increased, the magnetization is increased.
- If the temperature is increased, the magnetization is increased.
- Both A and B are true.
- A is true but B is false.
- B is true but A is false.
- Both A and B are false.
Two coils have a mutual inductance $0.005 H$. The current changes in the first coil according to equation $I = I _0 \sin$
$\Omega t$, where $I _0=10 A$ and $\omega=100 \pi rad s ^{-1}$. The maximum value of emf in the second coil is
→$\Omega t$, where $I _0=10 A$ and $\omega=100 \pi rad s ^{-1}$. The maximum value of emf in the second coil is