One conducting U tube can slide inside a...

One conducting U tube can slide inside another as shown in figure, maintaining electrical contacts between the tubes. The magnetic field B is perpendicular to the plane of the figure. If each tube moves towards the other at a constant speed v. Then the emf induced in the circuit in terms of B, l and v where l is the width of each tube will be

`zero`

`2 Blv`

`B//v`

`-B//v`

Text Solution

Verified by Experts

The correct Answer is:

Two emf's induced in the closed circuit each of value `Blv`. These two emf's are additive. So `E_(net)=2Blv`.

Topper's Solved these Questions

ELECTROMAGNETIC INDUCTION
A2Z|Exercise Inductor Circuits|31 Videos
ELECTROMAGNETIC INDUCTION
A2Z|Exercise Applications Of Emi|58 Videos
ELECTROMAGNETIC INDUCTION
A2Z|Exercise Section D - Chapter End Test|30 Videos
ELECTRIC POTENTIAL & CAPACITANCE
A2Z|Exercise Section D - Chapter End Test|29 Videos
ELECTROMAGNETIC WAVES AND COMMUNICATION SYSTEM
A2Z|Exercise Section D - Chapter End Test|30 Videos

Similar Questions

Explore conceptually related problems

A conducting wire xy of lentgh l and mass m is sliding without friction on vertical conduction rails ab and cd as shown in figure. A uniform magnetic field B exists perpendicular to the plane of the rails, x moves with a constant velocity of

A wire is bent in the form of a V shape and placed in a horizontal plane.There exists a uniform magnetic field B perpendicular to the plane of the wire. A uniform conducting rod starts sliding over the V shaped wire with a constant speed v as shown in the figure. If the wire no resistance, the current in rod wil

A ring of radius R is rolling on a horizontal plane with constant velocity v. There is a constant and uniform magnetic field B which is perpendicular to the plane of the ring. Emf across the lowest point A and right-most point C as shown in the figure will

Figure shows a wire sliding on two parallel, conducting rails placed at a separation L . A magnetic field B exists in a direction perpendicular to the plane of the rails. What force is necessary to keep the wire moving at a constant velocity V ?

In the figure shown as uniform magnetic field |B|=0.5T is perpendicular to the plane of circuit. The sliding rod of length l=0.25 m moves uniformly with constant speed v=4ms^-1 . If the resistance of the sllides is 2Omega , then the current flowing through the sliding rod is

Each of the batteries shown in figure has an emf equal to 5 V. Show that the magnetic field B at the point P is zero for any set of values of the resistances .

a conducting wire os mass m slides down two smooth conducting bars, set at an angle theta to the horizontal as shown in . The separatin between the bars is l . The system is located in the magnetic field B , perpendicular to the plane of the sliding wire and bars. The constant velocity of the wire is

Figure shown a square loop of side l being moved towards right at a constant speed v . The front edge enters th emagnetic field B at t=0 . The width of field is 3l . Sketch induced emf versus time graph.

A rod lies acrossfrictionless rails in a uniform magnetic field vec(B) as shown in figure. The rod moves to the right with speed V . In order to make the induced emf in the circuit to be zero, the magnitude of the magnetic field should

Imagine a would where free magnetic charges exist. In this world, a circuit is made with a U shape wire and a rod free to slide on it. A current carried by free magnetic charges can flow in the circuit. When the circuit is placed in a uniform electric field. E perpendicular to the plane of the plane of the circuit and the rod is pulled to the right with a constant speed v, the "magnetic EMF" in the current and the direction of the corresponding current. arising because of changing electric flux will be (l is the length of the rod and c is speed of light).

A2Z-ELECTROMAGNETIC INDUCTION-Motional And Rotational Emf

A thin semicircular conducting ring of radius R is falling with its pl...
Text Solution
|
At a plane the value of horizontal component of the eart's magnetic fi...
Text Solution
|
One conducting U tube can slide inside another as shown in figure, mai...
Text Solution
|
Consider the situation shown in the figure. The wire Ab is sliding on ...
Text Solution
|
A square metallic wire loop of side 0.1 m and resistance of 1W is move...
Text Solution
|
A conductor ABOCD moves along its bisector with a velocity of 1 m//s t...
Text Solution
|
A conducting rod of length L=0.1 m is moving with a uniform sped v=0.2...
Text Solution
|
A conducting rod AC of length 4l is rotated about point O in a uniform...
Text Solution
|
A rectangular loop is being pulled at a constant speed v, through a re...
Text Solution
|
The figure shows four wire loops, with edge length of either L or 2L. ...
Text Solution
|
A rod of length l rotates with a small but uniform angular velocity om...
Text Solution
|
Two circular coils can be arranged in any of the three situation shown...
Text Solution
|
The back e.m.f. induced in a coil, when current change from 1 ampere t...
Text Solution
|
An e.m.f. of 5 "volt" is produced by a self-inductance, when the curre...
Text Solution
|
Calculate the energy stored in an inductor of inductance 50 mH when a ...
Text Solution
|
The current passing through a choke coil of 5 henry is decreasing at t...
Text Solution
|
Average energy stored in a pure inductance L when current i flows thro...
Text Solution
|
A solenoid has 2000 turns wound over a length of 0.3 m. Its cross-sect...
Text Solution
|
A coil is wound as a transformer of rectangular cross section. If all ...
Text Solution
|
Two coils of self-inductance L(1) and L(2) are placed closed to each o...
Text Solution
|