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|SSLC Exam results 2020 will be announced shortly, as per the announcement made by Education minister the results are expected to be out by 6th or 8th August 2020, Valuation of the papers been completed, preparations are being done to declare results
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|Notification for the recruitment of various jobs on basis of Competitive Exams been announced shortly by State and Central Government, To help you prepare for the Exam latest e – books are published in topics of Current affairs and others
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|Day’s Knowledge Guide
The energy consumed in units when a radio marked 60W is used for 50 hours is 3 units, The current that flows in single direction is Direct current, The current that changes its direction of flow at regular intervals of time is called Alternating current, A device that converts mechanical energy into electrical energy is called Dynamo, A device that converts electrical energy into mechanical energy is called Electric Motor., A dynamo that produces alternating current is called AC Dynamo.
A dynamo that produces direct current is called DC dynamo, An electric motor, which works on direct current, is called DC Motor., The rotating part of a dynamo or motor is called Armature., The source of electrical energy required to produce an electric current in the circuit is called Electromotive force., The SI unit of electromotive force is called Volt., Michael Faraday discovered the phenomenon of Electromagnetic induction., Electromagnetic Induction is the working principle of a dynamo.,
The device that detects electric current in a circuit Ais called Galvanometer., The emf induced in electromagnetic induction does not depend upon the Length of the magnet., In electromagnetic induction the induced emf is directly proportional to the rate of change of magnetic field linking to the conductor.The dynamo rule was discovered by John Ambrose Fleming, Dynamo rule discovered by Fleming is used to find the direction of motion of coil when the directions of induced, current and the direction of the magnetic field are known.,
A Commutator is used in a DC dynamo to change the direction of the current induced in the coil, The induced emf produced when a magnet is inserted into a coil does not depend upon the resistance of coil, To induce an emf in a closed coil, the magnetic flux linked with it must change, Electromagnetic induction is a phenomenon in which an emf is induced in a coil when lines of force of a magnetic field linked with the coil changes., The two ends of a coil are connected to the terminals of a galvanometer, if a magnet is pushed in the coil; the galvanometer shows a momentary deflection.,
The mechanical force on a current carrying conductor in a magnetic field is highest when the direction of current flows through the conductor is perpendicular to the direction of magnetic field, The type of current that can be transformed over very long distance easily is Alternating current, The AC supplied to our homes has a frequency of 100 hertz.
This means the armature of the generator producing the current rotates 50 times per second., While applying the motor rule we use the first three fingers of the left hand only.While applying the dynamo rule we use the first three fingers of the right hand only., The current induced in the coil of a dynamo changes for every half rotation of the armature., The type of magnet used in Faradays experiment is bar magnet.The SI unit of potential difference is Volt.
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