Mutual induction 10th class physics chapter 15 | mutual induction sabaq in urdu hindi | Atif ahmed скачать в хорошем качестве

Mutual induction 10th class physics chapter 15 | mutual induction sabaq in urdu hindi | Atif ahmed

Mutual induction 10th class physics chapter 15 | mutual induction sabaq in urdu hindi | Atif ahmed 15.8 MUTUAL INDUCTION The phenomenon of production of induced current in one coil due to change of current in a neighboring coil is called mutual induction. Suppose a system of two coils A and B placed close to each other (Fig.15.18). The coil A is connected to a battery and a switch, while a sensitive galvanometer is connected to the coil B. We observe that as soon as the switch of the coil A is closed, the galvanometer show Similarly, when the switch is opened, the galvanometer again shows a deflection but this time its direction is opposite to that of the previous case. We can explain these observations using Faraday's law of electromagnetic induction. When the switch of coil A is closed, a current begins to flow in the coil due to which magnetic field is developed across the coil. Some of the magnetic lines of force of this field start passing through the coil B. Since current is changing in the coil A, hence number of magnetic lines of force across the coil B also changes due to which a current is induced in the coil B in accordance with Faraday's law. When current in the coil A becomes steady, number of magnetic lines of force across the coil A also becomes constant. Therefore, there is no more change in number of magnetic lines of force through the coil B due to which induced current in coil B reduces to zero. Similarly, when the switch of the coil A is opened, the flow of current through it stops and its magnetic field reaches to zero. The number of magnetic lines of force through the coil B decreases to zero due to which current is again induced in it but in opposite direction to that in the previous case. SUMMARY  When electric current passes through a conductor, a magnetic field is set up in the space surrounding the conductor. In case of a straight current-carrying conductor, the lines of force are in the form of concentric circles.  Direction of magnetic field around a current-carrying conductor can be found using right hand rule: “Grasp a wire with your right hand such that your thumb is pointed in the direction of the conventional (positive) current. Then curling fingers of your hand will point in the direction of the magnetic field”.  When a straight current-carrying conductor is placed perpendicularly in a magnetic field, it experiences a force in a direction at right angles to both the directions of the field and the current.  When a current-carrying coil is placed in a magnetic field, it experiences a couple due to which the coil begins to rotate. A D.C motor operates on this principle. It converts electrical energy into mechanical energy.  The number of magnetic lines of force passing through a certain surface is known as the magnetic field strength through that surface.  When a magnetic field strength through a coil is changing, an e.m.f. is induced in it. The value of this induced e.m.f. is directly proportional to the rate of change of magnetic field strength.  An A.C generator consists of a coil and a magnet. When this coil is made to rotate in a magnetic field, the magnetic field strength through it continuously changes due to which an alternating voltage is induced in it. Thus, A.C generator converts mechanical energy into electrical energy.  If the change of current in a circuit induces a current in another circuit this phenomenon is known as mutual induction.  Transformer is an electrical device which is used to increase or decrease the value of an alternating voltage. It works on the principle of mutual induction Related searches 1. Mutual induction 2. Muutual induction in urdu 3. Mutual induction in hindi 4. Mutual induction sabaq 5. Mutual induction khan 6. Mutual induction foundation 7. Mutual induction haytham 8. Mutual induction 10th physics 9. Mutual induction 10 class 10. Mutual induction 10th class physics chapter 15 10th class physics chapter 15 Mutual induction