[{"id":166379,"question":"When a current carrying conductor is placed in magnetic field at right angle to it. The direction of force acting upon it is:","choices":[{"text":"The same as direction of field","value":"A"},{"text":"Opposite the direction of field","value":"B"},{"text":"Makes an angle of 45<sup>o</sup>with the current","value":"C"},{"text":"At right angle to both the field and the current.","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":166378,"question":"The shape of magnetic lines of force in case of a straight current carrying conductor is:","choices":[{"text":"Eliptical","value":"A"},{"text":"Trangular","value":"B"},{"text":"Rectangular","value":"C"},{"text":"Circular","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":166377,"question":"If the change of current in a circuit induces a current in another circuit, this phenomena is known as:","choices":[{"text":"Self induction","value":"A"},{"text":"Mutual induction","value":"B"},{"text":"Electromagnetic induction","value":"C"},{"text":"None mutual induction","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":166376,"question":"In A.C. generator flux will be zero if coil is to the field.","choices":[{"text":"90<sup>o</sup>","value":"A"},{"text":"45<sup>o</sup>","value":"B"},{"text":"Parallel","value":"C"},{"text":"Inclined","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":166375,"question":"Transformer which increase voltage is called.","choices":[{"text":"Step-up transformer","value":"A"},{"text":"Step down transformer","value":"B"},{"text":"D.C.Moter","value":"C"},{"text":"A.C.genrator","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":166374,"question":"The voltage is decreased by:","choices":[{"text":"Step-up transformer","value":"A"},{"text":"Step-down transformer","value":"B"},{"text":"A.C. generator","value":"C"},{"text":"D.C. Motor","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":166373,"question":"Which device has two coils, primary and secondary?","choices":[{"text":"D.C. Motor","value":"A"},{"text":"Transformer","value":"B"},{"text":"A.C. genrator","value":"C"},{"text":"a and b","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":166372,"question":"Which type of energy is converted into mechanical energy in the D.C. Motor.","choices":[{"text":"Magnetic energy","value":"A"},{"text":"Heat energy","value":"B"},{"text":"Electrical energy","value":"C"},{"text":"Chemical energy","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":166371,"question":"When did Michael Faraday discover Electromagnetic induction?","choices":[{"text":"1841","value":"A"},{"text":"1831","value":"B"},{"text":"1821","value":"C"},{"text":"1811","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":166370,"question":"Who discovered Electromagnetic induction?","choices":[{"text":"Michael Faraday","value":"A"},{"text":"Flemiing","value":"B"},{"text":"Ohm","value":"C"},{"text":"Coulomb","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":166369,"question":"In D.C.motor split rings are made of:","choices":[{"text":"Steel","value":"A"},{"text":"Carbon","value":"B"},{"text":"Copper","value":"C"},{"text":"Iron","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":166368,"question":"The force on a current carrying conductor is maximum if angle between field and conductor is:","choices":[{"text":"0<sup>o</sup>","value":"A"},{"text":"90<sup>o</sup>","value":"B"},{"text":"180<sup>o</sup>","value":"C"},{"text":"45<sup>o</sup>","value":"D"},{"value":"E"}],"correctAnswer":2}]