phy_subtop_qns.json

{"0": {"1":{"question":"What is the speed of light in vacuum?", "options":{"A":"2x10^8 m/s", "B":"3x10^8 m/s", "C":"4x10^8 m/s", "D":"5x10^8 m/s"}, "answer":"B", "sub_topic_id":3},
             "2":{"question":"What is the formula for spherical mirrors?", "options":{"A":"1/v - 1/u = 1/f", "B":"1/v + 1/u = 1/f", "C":"v/u = f/2", "D":"None of the above"}, "answer":"B", "sub_topic_id":2},
  "3":{"question":"What is the formula for lenses?", "options":{"A":"1/v - 1/u = 1/f", "B":"1/v + 1/u = 1/f", "C":"v/u = f/2", "D":"None of the above"}, "answer":"A", "sub_topic_id":7},
  "4":{"question":"What is the power of a lens?", "options":{"A":"The reciprocal of its focal length", "B":"The square of its focal length", "C":"The cube of its focal length", "D":"None of the above"}, "answer":"A", "sub_topic_id":8},
  "5":{"question":"What happens to a light ray when it travels from a denser medium to a rarer medium?", "options":{"A":"It bends towards the normal", "B":"It bends away from the normal", "C":"It does not bend", "D":"None of the above"}, "answer":"B", "sub_topic_id":4}
},
  "1": {"1":{"question":"What is the ability of the eye to focus on both near and distant objects called?", "options":{"A":"Accommodation", "B":"Dispersion", "C":"Refraction"}, "answer":"A", "sub_topic_id":1},
        "2":{"question":"What is the smallest distance at which the eye can see objects clearly without strain called?", "options":{"A":"Far point of the eye", "B":"Near point of the eye", "C":"Focal length of the eye"}, "answer":"B", "sub_topic_id":0},
        "3":{"question":"Which refractive defect of vision is corrected by using a concave lens of suitable power?", "options":{"A":"Myopia", "B":"Hypermetropia", "C":"Presbyopia"}, "answer":"A", "sub_topic_id":2},
        "4":{"question":"What is the splitting of white light into its component colours called?", "options":{"A":"Refraction", "B":"Dispersion", "C":"Scattering"}, "answer":"B", "sub_topic_id":4},
        "5":{"question":"What causes the blue colour of the sky?", "options":{"A":"Dispersion of light", "B":"Reflection of light", "C":"Refraction of light"}, "answer":"A", "sub_topic_id":5}},
  "2": {"1":{"question":"What is the SI unit of electric current?", "options":{"A":"Volt", "B":"Ohm", "C":"Ampere", "D":"Watt"}, "answer":"C", "sub_topic_id":0},"2":{"question":"What is the unit of power?", "options":{"A":"Ampere", "B":"Ohm", "C":"Volt", "D":"Watt"}, "answer":"D", "sub_topic_id":9},"3":{"question":"What is the equivalent resistance of two resistors in series with resistances 2Ω and 3Ω?", "options":{"A":"5Ω", "B":"6Ω", "C":"7Ω", "D":"8Ω"}, "answer":"B", "sub_topic_id":6},"4":{"question":"What is the commercial unit of electrical energy?", "options":{"A":"Joule", "B":"Watt", "C":"Kilowatt hour", "D":"Ampere hour"}, "answer":"C", "sub_topic_id":9},"5":{"question":"What is Ohm's law?", "options":{"A":"The potential difference across the ends of a resistor is directly proportional to the current through it", "B":"The resistance of a conductor depends directly on its length", "C":"The electrical energy dissipated in a resistor is given by W = V x I x t", "D":"The equivalent resistance of several resistors in series is equal to the sum of their individual resistances"}, "answer":"A", "sub_topic_id":2}},

"3":{"1":{"question":"What is the direction of the magnetic field at a point?", "options":{"A":"South", "B":"North", "C":"The direction that a north pole placed at that point would take", "D":"East"}, "answer":"C", "sub_topic_id":0},"2":{"question":"What is the safety device used for protecting the circuits due to short-circuiting or overloading of the circuits?", "options":{"A":"Fuse", "B":"Switch", "C":"Circuit breaker", "D":"Amplifier"}, "answer":"A", "sub_topic_id":7},"3":{"question":"What is the potential difference between the live wire and neutral wire in our houses?", "options":{"A":"110 V", "B":"220 V", "C":"440 V", "D":"660 V"}, "answer":"B", "sub_topic_id":7},"4":{"question":"What is the direction of force acting on a current-carrying conductor when the direction of the field and that of the current are mutually perpendicular to each other?", "options":{"A":"Parallel to the field", "B":"Perpendicular to the field", "C":"Perpendicular to both", "D":"None of the above"}, "answer":"C", "sub_topic_id":4},"5":{"question":"What is the pattern of the magnetic field around a conductor due to an electric current flowing through it?", "options":{"A":"A series of concentric circles", "B":"A straight line", "C":"A parabolic curve", "D":"A sinusoidal curve"}, "answer":"A", "sub_topic_id":1}}
}