[{"id":151792,"question":"The induced current in a conductor depends upon","choices":[{"text":"Resistance of the loop","value":"A"},{"text":"Speed with which the conductor moves","value":"B"},{"text":"Any of these","value":"C"},{"text":"Both A and B","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":4},{"id":151791,"question":"The Phenomenon of generation of induced emf is called","choices":[{"text":"Electrostatic induction","value":"A"},{"text":"Magnetic induction","value":"B"},{"text":"Electromagnetic induction","value":"C"},{"text":"Electric induction","value":"D"},{"text":"Both A and B","value":"E"}],"correctAnswer":3},{"id":151790,"question":"An induced current can be produced by","choices":[{"text":"Constant magnetic field","value":"A"},{"text":"Changing magnetic field","value":"B"},{"text":"Varying electric field","value":"C"},{"text":"Constant electric field","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":2},{"id":151789,"question":"An emf is set up in a conductor when it","choices":[{"text":"Is kept in a magnetic field","value":"A"},{"text":"Is kept in an electric field","value":"B"},{"text":"Moves across a magnetic field","value":"C"},{"text":"Both A and B","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":3},{"id":151788,"question":"The current produced by moving a loop of wire across a magnetic field is called","choices":[{"text":"Direct current","value":"A"},{"text":"Magnetic current","value":"B"},{"text":"Alternating current","value":"C"},{"text":"Induced current","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":4},{"id":151161,"question":"Which of the following is most suitable as the core of transformer","choices":[{"text":"Soft iron","value":"A"},{"text":"Alinco","value":"B"},{"text":"Steel","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":151160,"question":"The practical application of the phenomenon of Mutual induction is","choices":[{"text":"Transformers","value":"A"},{"text":"Generator","value":"B"},{"text":"Motor","value":"C"},{"text":"All of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":151158,"question":"A device which converts Electrical energy into mechanical energy is called as","choices":[{"text":"Transformer","value":"A"},{"text":"Generator","value":"B"},{"text":"Motor","value":"C"},{"text":"All of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":151157,"question":"A.C. can be measure with the help of","choices":[{"text":"Nuclear effect","value":"A"},{"text":"Magnetic effect","value":"B"},{"text":"Chemical effect","value":"C"},{"text":"Heating effect","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":151155,"question":"Split rings act as","choices":[{"text":"Vibrator","value":"A"},{"text":"Resistor","value":"B"},{"text":"Motor","value":"C"},{"text":"Commulator","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":151154,"question":"The work is stored in the inductor as","choices":[{"text":"Electric potential energy","value":"A"},{"text":"Elastic potential energy","value":"B"},{"text":"Magnetic energy","value":"C"},{"text":"Absolute potential energy","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":151152,"question":"Self inducede e.m.f. is also called","choices":[{"text":"Motional e.m.f.","value":"A"},{"text":"Thermistor","value":"B"},{"text":"Electrostatic induction","value":"C"},{"text":"Back e.m.f","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":151150,"question":"The ratio of average e.m.f in the coil tot he time rate of change of current in the same coil is called","choices":[{"text":"Mutual induction","value":"A"},{"text":"Mutual inductance","value":"B"},{"text":"Capacitance","value":"C"},{"text":"Self inductance","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":151148,"question":"Lens's law deals with the","choices":[{"text":"Magnitude of induced current","value":"A"},{"text":"Magnitude of induced e.m.f","value":"B"},{"text":"Direction of induced e.m.f","value":"C"},{"text":"Direction of induced current","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":151147,"question":"The motional e.m.f depends upon the","choices":[{"text":"Length of a conductor","value":"A"},{"text":"Strength of a magnet","value":"B"},{"text":"Speed of the conductor","value":"C"},{"text":"All of the above","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":151146,"question":"Back emf is produced due to","choices":[{"text":"Self induction","value":"A"},{"text":"Mutual induction","value":"B"},{"text":"A.C","value":"C"},{"text":"Lenz's law","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":151145,"question":"The SI unit of magnetic induction is","choices":[{"text":"Weber","value":"A"},{"text":"Weber/meter","value":"B"},{"text":"Henry","value":"C"},{"text":"Tesla","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":151143,"question":"Transformer is used to","choices":[{"text":"Increase alternating current","value":"A"},{"text":"Increase d.c voltage","value":"B"},{"text":"Increase & Decrease emf","value":"C"},{"text":"All answers are right","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":151142,"question":"Lenz's law is the consequence of","choices":[{"text":"Mass","value":"A"},{"text":"Energy conservation","value":"B"},{"text":"Momentum conservation","value":"C"},{"text":"Charge","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":151141,"question":"The change of magnetic flux through a circuit will produce","choices":[{"text":"Magnetic Field","value":"A"},{"text":"Electric Field","value":"B"},{"text":"emf","value":"C"},{"text":"a.c","value":"D"},{"value":"E"}],"correctAnswer":2}]