[{"id":111192,"question":"The SI unit of flux density is.","choices":[{"text":"Tesla","value":"A"},{"text":"Weber","value":"B"},{"text":"Gaun","value":"C"},{"text":"Weber/meter","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":111191,"question":"The unit of flux density is also given by","choices":[{"text":"Weber/m<sup>2</sup>or Wb . m<sup>-2</sup>","value":"A"},{"text":"Weber/mor Wb . m","value":"B"},{"text":"Weber/mor Wb . m<sup>-1</sup>","value":"C"},{"text":"Weber or Wb","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":111190,"question":"The SI unit of flux density is","choices":[{"text":"Newton/Amp-meter","value":"A"},{"text":"Newton-m/Ampere","value":"B"},{"text":"Newton-m/Amp<sup>2</sup>","value":"C"},{"text":"Newton-Amp/meter","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":111189,"question":"The straight current carrying conductor experiences maximum force in a uniform magnetic field when it is placed","choices":[{"text":"parallel to the field","value":"A"},{"text":"Perpendicular to the field","value":"B"},{"text":"At an angle of 45 to the field","value":"C"},{"text":"None of the above","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":111188,"question":"The SI unit of magnetic flux is.","choices":[{"text":"weber","value":"A"},{"text":"Nm<sup>-1</sup>A<sup>-1</sup>","value":"B"},{"text":"tesla","value":"C"},{"text":"gauss","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":111187,"question":"The total number of lines of magnetic induction pasing through a surface perpendicular to the magnetic field is called","choices":[{"text":"magnetic flux","value":"A"},{"text":"magnetic flux density","value":"B"},{"text":"magnetic induction","value":"C"},{"text":"magnetic field intensity","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":111186,"question":"The unit of magnetic flux is","choices":[{"text":"Weber-m<sup>2</sup>","value":"A"},{"text":"Weber-m<sup>3</sup>","value":"B"},{"text":"Henry","value":"C"},{"text":"Weber","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":111185,"question":"Weber is a unit of","choices":[{"text":"magnetic flux","value":"A"},{"text":"magnetic filed intensity","value":"B"},{"text":"magnetic induction","value":"C"},{"text":"magnetic flux density","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":111184,"question":"Magnetic flux and flux density are related by","choices":[{"text":"Flux density = flux x area","value":"A"},{"text":"Flux density = flux / area","value":"B"},{"text":"Flux density = flux - area","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":111183,"question":"The SI unit of magnetic flux is","choices":[{"text":"NmA<sup>-2</sup>","value":"A"},{"text":"NmA<sup>-1</sup>","value":"B"},{"text":"NAm<sup>-1</sup>","value":"C"},{"text":"Nm<sup>2</sup>A<sup>-1</sup>","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":111182,"question":"If current through conductor is 1 A and length of conductor is 1m placed at right angle to the magnetic field, then the strength of magnetic field is","choices":[{"text":"F = B<sup>2</sup>","value":"A"},{"text":"F = 0","value":"B"},{"text":"F = B","value":"C"},{"text":"F = B/2","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":111181,"question":"The force exerted on a conductor of length L, carrying current I when placed in a magnetic field B is given by","choices":[{"text":"F=IB/L","value":"A"},{"text":"F= L x B/I","value":"B"},{"text":"F = IL x B","value":"C"},{"text":"F = IL . B","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":111180,"question":"The SI unit of magnetic induction is","choices":[{"text":"Gauses","value":"A"},{"text":"Tesla","value":"B"},{"text":"Weber","value":"C"},{"text":"Weber<sup>2</sup>","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":111179,"question":"A relationship between Gauses of magnetic induction and Tesla(T) is given by","choices":[{"text":"G 10<sup>-3</sup>T","value":"A"},{"text":"G = 10<sup>-2</sup>T","value":"B"},{"text":"G = 10<sup>-4</sup>T","value":"C"},{"text":"G = 10<sup>-1</sup>T","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":111178,"question":"A meter wire carraying a current of 2A is at right angle to the uniform magnetic field of 0.5 Weber/m<sup>2</sup>The force on the wire is","choices":[{"text":"5N","value":"A"},{"text":"4N","value":"B"},{"text":"1.5N","value":"C"},{"text":"6N","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":111177,"question":"The SI unit of magnetic induction is tesla which is equal to","choices":[{"text":"Newton/ampere-meter or N/A-m","value":"A"},{"text":"Newton/ampere<sup>2</sup>-meter or N/A<sup>2</sup>-m","value":"B"},{"text":"Newton/ampere<sup>2</sup>-meter<sup>2</sup> or N/A<sup>2</sup>-m<sup>2</sup>","value":"C"},{"text":"Newton/ampere<sup>2</sup>-meter<sup>2</sup>or N/A<sup>2</sup>-m<sup>2</sup>","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":111176,"question":"The force acting as one meter length of the conductor placed at right angle to the magnetic field, when one A current is passing through it, defines the","choices":[{"text":"magnetic flux","value":"A"},{"text":"magnetic induction","value":"B"},{"text":"magnetic field","value":"C"},{"text":"self inductance","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":111175,"question":"Gauss(G) is smaller unit of magnetic induction which is related to tesla(T) as","choices":[{"text":"IT = 10<sup>-4 </sup>G","value":"A"},{"text":"IT = 10<sup>5</sup>G","value":"B"},{"text":"IT = 10<sup>3</sup>G","value":"C"},{"text":"IT = 10<sup>4</sup>G","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":111174,"question":"The force acting on a charge moving in a magnetic field","choices":[{"text":"is perpendicular to the both magnetic field and direction of motion","value":"A"},{"text":"is proportional to the magnetic of charges","value":"B"},{"text":"vanishes when the motion is directly opposite to the direction of field","value":"C"},{"text":"all of the above","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":111173,"question":"'K' is the proportionality constant of force experienced by conductor. What is the value of 'K' in SI units?","choices":[{"text":"0","value":"A"},{"text":"1","value":"B"},{"text":"0.5","value":"C"},{"text":"-1","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":111172,"question":"A current carrying conductor is placed at right angle to the magnetic field. The magnetic force experienced by the conductor is","choices":[{"text":"minimum","value":"A"},{"text":"maximum","value":"B"},{"text":"zero","value":"C"},{"text":"none of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":111171,"question":"In a straight current carrying conductor, the direction of magnetic field can be found by","choices":[{"text":"right hand rule","value":"A"},{"text":"left hand rule","value":"B"},{"text":"head to tall rule","value":"C"},{"text":"none of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":111170,"question":"The direction of lines of force depends upon the direction of","choices":[{"text":"voltage","value":"A"},{"text":"current","value":"B"},{"text":"charges","value":"C"},{"text":"none of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":111169,"question":"The most suitable material for permanent magnet is","choices":[{"text":"cobalt","value":"A"},{"text":"iron","value":"B"},{"text":"steel","value":"C"},{"text":"alaminium","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":111168,"question":"The field around a moving charge is called","choices":[{"text":"magnetic field","value":"A"},{"text":"conservative field","value":"B"},{"text":"non-conservative field","value":"C"},{"text":"none of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":111167,"question":"The sources of magnetic field are","choices":[{"text":"isolated magnetic poles","value":"A"},{"text":"charges at rest","value":"B"},{"text":"charges in motion","value":"C"},{"text":"none of these","value":"D"},{"value":"E"}],"correctAnswer":3}]