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1
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Demonstrate the Magnetic effect of electric current with the help of Hans Oersted's experiment.
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2
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Mention the characteristics of the magnetic field produced around the current-carrying straight conductor. What will be the effect when the conductor is bent in the form of a coil (Solenoid)? Explain with the help of a diagram.
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3
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Differentiate between Electromagnet and Permanent Magnet. Draw a diagram and describe the factors affecting their strength.
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4
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Differentiate between current-carrying Solenoid and Bar Magnet.
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5
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Explain the Clock Rule for finding the polarity at the end of a coil
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6
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Give examples of electrical devices that work on the Magnetic Effect of Electric Current. E.g. Electric Bell.
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7
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Explain the right-hand hand-thumb rule for finding the direction of the Magnetic Field around a current-carrying conductor.
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8
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Explain why the armature of an electric bell is made of soft iron and not steel. Draw a labelled diagram of an electric bell with its electrical connections.
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9
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Explain the effect (force) on a current-carrying conductor present in a magnetic field with the help of an experiment.
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10
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Explain Fleming's Left Hand Rule to find the direction of force on a current-carrying conductor placed in a magnetic field.
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11
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Explain the factors affecting the magnitude of the Lorentz Force.
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12
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The SI unit of the magnetic field is N/Am. What are its other units?
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13
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Draw a simple diagram for the DC motor and give its principles.
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14
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What are the functions of different parts used in a DC motor?
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15
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Give the Application of a DC motor which converts Electrical energy into Mechanical.
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16
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Mention the factors affecting the speed of rotation of the coil in the motor.
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17
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What do you mean by a radial field produced due to the insertion of a soft iron core?
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18
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Explain the concept of Magnetic Flux and its change.
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19
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State the principle of AC generator.
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20
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Explain Faraday's Laws of Electromagnetic Induction.
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21
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Explain Fleming's Right-hand rule and Lenz Law to find out the direction of induced current.
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22
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Why Induced EMF opposes the change in the magnetic flux?
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23
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Draw a diagram of the AC generator and explain the functions of its different parts.
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24
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Differentiate between AC and DC and how the magnetic field changes around them.
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25
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What do you mean by the transformer? Give its principle and explanation along with diagrams of Step-up, as well as Step-down transformers.
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26
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Explain different parts of the Transformer and their functions.
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27
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A step-up transformer is given a d.c. Input of 100 V. What is the output voltage?
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28
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Why do birds fly off a high-tension wire when the current is switched ON?
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29
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Mention the factors affecting the Magnitude of induced EMF in an AC generator.
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30
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Draw the magnetic field lines around a straight current-carrying wire. How does the strength of the magnetic field vary with the distance from the wire?
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