[{"id":155105,"question":"The velocity given to a body to go out of the influence of earth's gravity is known as:","choices":[{"text":"Terminal velocity","value":"A"},{"text":"Orbital velocity","value":"B"},{"text":"Escape velocity","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":155103,"question":"When two protons are brought closer potential energy of both of them:","choices":[{"text":"Increases","value":"A"},{"text":"Decreases","value":"B"},{"text":"Remains same","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":155100,"question":"A body of weight 1 N has a kinetic energy of 1 joule when its speed is:","choices":[{"text":"1.46 m sec<sup>-1</sup>","value":"A"},{"text":"2.44 m sec<sup>-1</sup>","value":"B"},{"text":"3.42 m sec<sup>-1</sup>","value":"C"},{"text":"4.43 m sec<sup>-1</sup>","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":155098,"question":"Tick the conservative force:","choices":[{"text":"tension in a string","value":"A"},{"text":"Air resistance","value":"B"},{"text":"Elastic spring force","value":"C"},{"text":"Frictional force","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":155096,"question":"Work done along a closed path in a gravitational force is:","choices":[{"text":"maximum","value":"A"},{"text":"Minimum","value":"B"},{"text":"Zero","value":"C"},{"text":"Unity","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":154221,"question":"When a conductoris moved across a magnetic field:","choices":[{"text":"Emf induced its similar to that of a battery","value":"A"},{"text":"Emf induced gives rise to induced current","value":"B"},{"text":"An emf is induced across its ends","value":"C"},{"text":"All are correct","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":4},{"id":154220,"question":"In the equilibrium state, the potential difference between two ends of the conductor moving across a magnetic field is called:","choices":[{"text":"Both A and C","value":"A"},{"text":"Induced emf","value":"B"},{"text":"Both A and B","value":"C"},{"text":"Motion emf","value":"D"},{"text":"Electrostatic emf","value":"E"}],"correctAnswer":1},{"id":154219,"question":"In the equilibrium state, the potential difference between two ends of the conductor moving across a magnetic field is called:","choices":[{"text":"Motion emf","value":"A"},{"text":"Electrostatic emf","value":"B"},{"text":"Induced emf","value":"C"},{"text":"Both A and B","value":"D"},{"text":"Both A and C","value":"E"}],"correctAnswer":5},{"id":154218,"question":"When a conductor is moved across a magnetic field, the redistribution of charge sets up:","choices":[{"text":"Magnetic field","value":"A"},{"text":"Electrostatic field","value":"B"},{"text":"Electromagnetic field","value":"C"},{"text":"All of these","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":2},{"id":154216,"question":"When a conductor moved with its length parallel to the lines of magnetic fled:","choices":[{"text":"An emf is induced across its ends","value":"A"},{"text":"Emf induced is similar to that of a battery","value":"B"},{"text":"Emf passes through the conductor","value":"C"},{"text":"Both A and B","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":5},{"id":154215,"question":"The product of induced current and the resistance of the wire through which the current is passing is called:","choices":[{"text":"Electromagnetic induction","value":"A"},{"text":"induced emf","value":"B"},{"text":"Induced current","value":"C"},{"text":"Self induced","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":2},{"id":154214,"question":"The unit of induced emf is:","choices":[{"text":"Volt","value":"A"},{"text":"Nm/As","value":"B"},{"text":"Joule coul<sup>-1</sup>","value":"C"},{"text":"Both A and C","value":"D"},{"text":"All of these","value":"E"}],"correctAnswer":5},{"id":154213,"question":"Referring to above figure, a changing current in coil P can be produced:","choices":[{"text":"At the instant the switch is closed","value":"A"},{"text":"At the instant the switch is opened","value":"B"},{"text":"With the help of rheostat","value":"C"},{"text":"All of these","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":4},{"id":154211,"question":"Referring to above figure, due to change in current in the coil P, the change in magnetic flux:","choices":[{"text":"Is associated with coil P","value":"A"},{"text":"Is associated with coil S","value":"B"},{"text":"Causes an induced current is coil S","value":"C"},{"text":"All of these","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":4},{"id":154206,"question":"Referring to above figure, current in coil P falls from its maximum value to zero:","choices":[{"text":"At the instant the switch is closed","value":"A"},{"text":"At the instant the switch is opened","value":"B"},{"text":"When switch is kept open","value":"C"},{"text":"When switch is kept closed","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":2},{"id":154204,"question":"Referring to above figure, current in the coil P grows from zero to its maximum value:","choices":[{"text":"At the instant the switch is closed","value":"A"},{"text":"At the instant the switch is opened","value":"B"},{"text":"When switch is kept open","value":"C"},{"text":"All of above","value":"D"},{"text":"Neither of above","value":"E"}],"correctAnswer":1},{"id":154201,"question":"A coil of constant area is placed in a constant magnetic field. An induced current is produced in the coil when:","choices":[{"text":"The coil is distorted","value":"A"},{"text":"The coil is rotated","value":"B"},{"text":"The coil is neither distorted nor rotated","value":"C"},{"text":"Both A and B","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":4},{"id":154198,"question":"Instead of moving the coil towards a magnet, the magnet is moved towards the coil with the same speed. The galvanometer shows current:","choices":[{"text":"Of same magnitude in the same direction","value":"A"},{"text":"Of different magnitude in the same direction","value":"B"},{"text":"Of same magnitude but in opposite direction","value":"C"},{"text":"Of different magnitude in the opposite direction","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":3},{"id":154195,"question":"When there is no relative motion between the magnet and coil, the galvanometer indicates:","choices":[{"text":"No current in circuit","value":"A"},{"text":"An increasing current","value":"B"},{"text":"A decreasing current","value":"C"},{"text":"Either B or C","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":154193,"question":"<br>The magnitude of induced emf depends upon the:","choices":[{"text":"Rate of decrease of magnetic field","value":"A"},{"text":"Rate of change of magnetic field","value":"B"},{"text":"Rate of increase of magnetic flux","value":"C"},{"text":"Constancy of magnetic field","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":2},{"id":154191,"question":"Micheal Faraday and joseph Henry belong respectively to:","choices":[{"text":"USA and England","value":"A"},{"text":"England and France","value":"B"},{"text":"England and USA","value":"C"},{"text":"USA and France","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":3},{"id":154189,"question":"In magnet-coil experiment, emf can be produced by:","choices":[{"text":"Keeping the coil stationary and moving the magnet","value":"A"},{"text":"Keeping the magnet stationary and moving the coil","value":"B"},{"text":"Relative motion of the loop and magnet","value":"C"},{"text":"Any one of above","value":"D"},{"text":"All above","value":"E"}],"correctAnswer":5},{"id":154185,"question":"The induced current in the loop can be increased by:","choices":[{"text":"Using a strong magnetic field","value":"A"},{"text":"Moving the loop faster","value":"B"},{"text":"Replacing the loop by a coil of many turns","value":"C"},{"text":"All of above","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":4},{"id":154183,"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":154180,"question":"The phenomenon of generation of induced emf is called:","choices":[{"text":"Electrostatic induced","value":"A"},{"text":"Magnetic induced","value":"B"},{"text":"Electromagnetic induced","value":"C"},{"text":"Electric induced","value":"D"},{"text":"Both A and C","value":"E"}],"correctAnswer":3},{"id":154176,"question":"<p class=\"MsoNormal\" style=\"margin-left:18.0pt\"><span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\">An\r\ninduced current can be produced by:</span><o:p></o:p></p>","choices":[{"text":"<span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\">Constant magnetic field</span>","value":"A"},{"text":"<span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\">Changing magnetic field</span>","value":"B"},{"text":"<span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\">Varying magnetic field</span>","value":"C"},{"text":"<span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\">Constant electric field</span>","value":"D"},{"text":"<span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\">None of these</span>","value":"E"}],"correctAnswer":2},{"id":154175,"question":"An induced current can be produced by:","choices":[{"text":"Constant magnetic field","value":"A"},{"text":"Changing magnetic field","value":"B"},{"text":"Varying magnetic field","value":"C"},{"text":"Constant electric field","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":2},{"id":154172,"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":154170,"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":154167,"question":"Eddy current is produced when:","choices":[{"text":"A metal is kept in varying magnetic field","value":"A"},{"text":"A metal is kept in steady magnetic field","value":"B"},{"text":"A circular coil is placed in a steady magnetic field","value":"C"},{"text":"A current is passed through a circular coil","value":"D"},{"value":"E"}],"correctAnswer":1}]