[{"id":166272,"question":" A positive and negative charges are initially 4 cm apart. When they are moved closer together so that they are now only 1 cm apart, the force between them is:","choices":[{"text":"4 times smaller than before","value":"A"},{"text":"4 times larger than before","value":"B"},{"text":"8 times larger than before","value":"C"},{"text":"16 times larger than before.","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":166271,"question":" The coulomb's law is valid for the charges which are:","choices":[{"text":"moving and point charges","value":"A"},{"text":"moving and non-point charges","value":"B"},{"text":"stationary and pont charges","value":"C"},{"text":"stationary and large size charges","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":166269,"question":" According to Coulomb's law , what happens to the attraction of two oppositely charged objects as their distance of separation increases?","choices":[{"text":"Increase","value":"A"},{"text":"Decreased","value":"B"},{"text":"remain unchanged","value":"C"},{"text":"can not be determined","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":166268,"question":" When you rub a plastic rod against your hair several times and put it near some bits of paper, the pieces of papers are attracted towards it. What does this observation indicate?","choices":[{"text":"the rod and the paper are oppositely charged","value":"A"},{"text":"the rod acquires a positive charge","value":"B"},{"text":"the reod and the paper have the same charges","value":"C"},{"text":"the rod acquires a negative charge","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":166266,"question":" Two uncharged objects A and B are rubbed against each other. When object B is placed near a negatively charged object C, the two objects repel each other. Which of these statements is true about object A.","choices":[{"text":"Remains uncharged","value":"A"},{"text":"Becomes positively charged","value":"B"},{"text":"Becomes negatively charged","value":"C"},{"text":"Unpredicatable","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":166264,"question":" An object gains excess negative charge after being rubbed against another object, which is:","choices":[{"text":"Neutral","value":"A"},{"text":"Negatively charged","value":"B"},{"text":"Charged","value":"C"},{"text":"Either, a,b,and c","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":166263,"question":" A positive electric charge:","choices":[{"text":"Attracts other positive charge","value":"A"},{"text":"Repels other positive charge","value":"B"},{"text":"Attracts a neutral charge","value":"C"},{"text":"Repels a neutral chage","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":40511,"question":"Mathematical formula of capacitance of a capacitor is:","choices":[{"text":"C = QV","value":"A"},{"text":"C = Q/V","value":"B"},{"text":"C = V/Q","value":"C"},{"text":"C = V2/Q","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":40510,"question":"The S.I unit of electric potential is:","choices":[{"text":"Watt","value":"A"},{"text":"Joule","value":"B"},{"text":"Coulomb","value":"C"},{"text":"Volt","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":40509,"question":"The SI unit of electric field intensity is:","choices":[{"text":"NC-2","value":"A"},{"text":"NC-1","value":"B"},{"text":"Ns","value":"C"},{"text":"Nm-1","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":40508,"question":"Field around a charge in which that charge exerts a force on a point charge brought in that field is called:","choices":[{"text":"Electric field","value":"A"},{"text":"Magnetic field","value":"B"},{"text":"Neutral zone","value":"C"},{"text":"Point charge","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":40507,"question":"A positive electric charge:","choices":[{"text":"Attracts other positive charge","value":"A"},{"text":"Repels other positive charge","value":"B"},{"text":"Attracts a neutral particle","value":"C"},{"text":"Repels a neutral particle","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":40506,"question":"Coulomb's law is mathematically stated as:","choices":[{"text":"F = k q1 q2/r3","value":"A"},{"text":"F = k q2 q2 / r2","value":"B"},{"text":"F = k q1 q2 / r","value":"C"},{"text":"F = k q1 q2 / r2","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":40505,"question":"If a charged body is brought near a negatively charged electroscope and the leaves of electroscope diverge, then the body is:","choices":[{"text":"Positively charged","value":"A"},{"text":"Negatively charged","value":"B"},{"text":"Neutral","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":40504,"question":"Electric field lines of force were first introduced by:","choices":[{"text":"Ampere","value":"A"},{"text":"Farady","value":"B"},{"text":"Fleming","value":"C"},{"text":"Coulomb","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":40503,"question":"Which device is used to store charge:","choices":[{"text":"Resister","value":"A"},{"text":"Capacitor","value":"B"},{"text":"Dielectric","value":"C"},{"text":"Fuse","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":40502,"question":"In the presence of a charged body, an insulated conductor develops positive charge at one end and negative charge at the other end, this i- called:","choices":[{"text":"Electrostatics","value":"A"},{"text":"Electrostatic induction","value":"B"},{"text":"Magnetism","value":"C"},{"text":"Electromagnetic induction","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":40501,"question":"If we double the distance between two charges, what will be the change in the force between them?","choices":[{"text":"Half","value":"A"},{"text":"Double","value":"B"},{"text":"One fourth","value":"C"},{"text":"Four times","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":40500,"question":"Unlike charges always:","choices":[{"text":"Repel each other","value":"A"},{"text":"Attract each other","value":"B"},{"text":"Sometimes repel and attract each other","value":"C"},{"text":"Both A and B","value":"D"},{"value":"E"}],"correctAnswer":2}]