[{"id":166367,"question":"According to Fleming's left hand rule the direction of force on the conductor is given by:","choices":[{"text":"Thumb","value":"A"},{"text":"Fore finger","value":"B"},{"text":"Middle finger","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":166366,"question":"According to Fleming's left hand rule the direction of magnetic field is indicated by:","choices":[{"text":"Thumb","value":"A"},{"text":"Forefinger","value":"B"},{"text":"Middle finger","value":"C"},{"text":"Right hand rule","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":166365,"question":"A current carrying conductor produces a field around it is called:","choices":[{"text":"Electric field","value":"A"},{"text":"Magnetic field","value":"B"},{"text":"Both a and b","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":166364,"question":"The magnetic field of a solenoid resembles as:","choices":[{"text":"Iron wire","value":"A"},{"text":"U-shape magnet","value":"B"},{"text":"Bar magnet","value":"C"},{"text":"Point charge.","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":166363,"question":"The end of solenoid from which lines of force emerge out is called:","choices":[{"text":"North pole","value":"A"},{"text":"South pole","value":"B"},{"text":"North and south pole","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":166362,"question":"The lines will be in the form of concentric circles, if conductor is:","choices":[{"text":"Circular","value":"A"},{"text":"Straight","value":"B"},{"text":"Solenoid","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":166361,"question":"If current is flowing from bottom end to the top end in a wire, according to right hand rule the direction of line of forces would be:","choices":[{"text":"Anti-clock wise","value":"A"},{"text":"Clock wise","value":"B"},{"text":"Left and Right","value":"C"},{"text":"Along the conductor.","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":166360,"question":"The number of lines of force in a magnetic field depends upon.","choices":[{"text":"Shape of coil","value":"A"},{"text":"Sixe of coil","value":"B"},{"text":"Magnet","value":"C"},{"text":"Strength of field","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":166359,"question":"Transformer Works on the principle of:","choices":[{"text":"Self induction","value":"A"},{"text":"Mutual induction","value":"B"},{"text":"Electro statatic","value":"C"},{"text":"Induction","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":166358,"question":"Iron core is used in tranformer to:","choices":[{"text":"Enhance the flux","value":"A"},{"text":"Decrease the flux","value":"B"},{"text":"Keep flux the same","value":"C"},{"text":"botha a and b","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":166357,"question":"A transformer has Np =100 and Ns =500 , if 6 volt D.C is applied across its primary, the induced voltage.","choices":[{"text":"0 V","value":"A"},{"text":"30 V","value":"B"},{"text":"45 V","value":"C"},{"text":"60 V","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":166356,"question":"The turn ratios of a transformer is 10. It means.","choices":[{"text":"I<sub>s</sub> = 10I<sub>p</sub>","value":"A"},{"text":"N<sub>s</sub> = N<sub>p</sub>","value":"B"},{"text":"N<sub>s</sub> = 10 N<sub>p</sub>","value":"C"},{"text":"V<sub>s</sub> =V<sub>p</sub> /10","value":"D"},{"value":"E"}],"correctAnswer":3}]