मराठी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान इयत्ता ११

A Metallic Loop is Placed in a Nonuniform Magnetic Field. Will an Emf Be Induced in the Loop? - Physics

Advertisements
Advertisements

प्रश्न

A metallic loop is placed in a nonuniform magnetic field. Will an emf be induced in the loop?

टीपा लिहा
Advertisements

उत्तर

According to Faraday's Law, an emf is induced in a loop when the magnetic flux through the loop changes. If the magnetic field is nonuniform, the flux through the loop changes as the position of the loop changes relative to the magnetic field or if the strength of the magnetic field varies over time. This change in flux induces an emf in the loop. Therefore, in a nonuniform magnetic field, there will be a change in magnetic flux through the loop, leading to the induction of an emf.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 16: Electromagnetic Induction - Short Answers [पृष्ठ ३०३]

APPEARS IN

एचसी वर्मा Concepts of Physics Vol. 2 [English] Class 11 and 12
पाठ 16 Electromagnetic Induction
Short Answers | Q 1 | पृष्ठ ३०३

संबंधित प्रश्‍न

The current flowing through an inductor of self inductance L is continuously increasing. Plot a graph showing the variation of

Magnetic flux versus the current


Draw a schematic sketch of an ac generator describing its basic elements. State briefly its working principle. Show a plot of variation of

(i) Magnetic flux and

(ii) Alternating emf versus time generated by a loop of wire rotating in a magnetic field.


A pair of adjacent coils has a mutual inductance of 1.5 H. If the current in one coil changes from 0 to 20 A in 0.5 s, what is the change of flux linkage with the other coil?


A rectangular coil having 60 turns and area of 0.4m2 is held at right angles to a uniform magnetic field of flux density 5 × 10-5T. Calculate the magnetic flux passing through it.


An inductor is connected to a battery through a switch. Explain why the emf induced in the inductor is much larger when the switch is opened as compared to the emf induced when the switch is closed.


Figure shows a horizontal solenoid connected to a battery and a switch. A copper ring is placed on a frictionless track, the axis of the ring being along the axis of the solenoid. As the switch is closed, the ring will __________ .


Answer the following question.
When a conducting loop of resistance 10 Ω and area 10 cm2 is removed from an external magnetic field acting normally, the variation of induced current-I in the loop with time t is as shown in the figure.
Find the
(a) total charge passed through the loop.
(b) change in magnetic flux through the loop
(c) magnitude of the field applied


Whenever the magnetic flux linked with an electric circuit changes, an emf is induced in the circuit. This is called ______.


Two coils, A and B, are lined such that emf ε is induced in B when the current in A is changing at the rate I. If current i is now made to flow in B, the flux linked with A will be ______.

The magnetic flux linked with a coil of N turns of area of cross-section A held with its plane parallel to the field B is ______.


The magnetic flux linked with the coil (in Weber) is given by the equation- Փ = 5t2 + 3t + 16. The induced EMF in the coil at time, t = 4 will be ______.


The unit of magnetic flux in SI is ______


The dimensional formula of magnetic flux is ______.


A cylindrical bar magnet is rotated about its axis (Figure). A wire is connected from the axis and is made to touch the cylindrical surface through a contact. Then


Consider a closed loop C in a magnetic field (Figure). The flux passing through the loop is defined by choosing a surface whose edge coincides with the loop and using the formula φ = B1.dA1 + B2.dA2 +... Now if we chose two different surfaces S1 and S2 having C as their edge, would we get the same answer for flux. Jusity your answer.


A coil is placed in a time varying magnetic field. If the number of turns in the coil were to be halved and the radius of wire doubled, the electrical power dissipated due to the current induced in the coil would be: (Assume the coil to be short circuited.)


In a coil of resistance 100 Ω a current is induced by changing the magnetic flux through it. The variation of current with time is shown in the figure. The magnitude of change in flux through the coil is ______.

 


The Figure below shows an infinitely long metallic wire YY' which is carrying a current I'.

P is a point at a perpendicular distance r from it.

  1. What is the direction of magnetic flux density B of the magnetic field at the point P?
  2. What is the magnitude of magnetic flux density B of the magnetic field at the point P?
  3. Another metallic wire MN having length l and carrying a current I is now kept at point P. If the two wires are in vacuum and parallel to each other, how much force acts on the wire MN due to the current I' flowing in the wire YY'?

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×