[{"id":170379,"question":"According to coulomb’s law, what happens to the attraction\r\nof two oppositely charged objects as their distance of separation increases:
","choices":[{"text":"Increases
","value":"A"},{"text":"Decreases
","value":"B"},{"text":"Remains unchanged
","value":"C"},{"text":"Cannot be determined
","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":170378,"question":"When you rub a plastic rod against your hair several times\r\nand put it near some bits of paper, the pieces of papers are attracted towards\r\nit. 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 rod and the paper have the same charges
","value":"C"},{"text":"The rod acquires a negative charge
","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":170376,"question":"Two uncharged objects a and b are rubbed against each other.\r\nWhen object b is placed near a negatively charged object c, the two objects\r\nrepel 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":"Unpredictable
","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":170374,"question":"An object gains excess negative charge after being rubbed\r\nagainst another object, which is:
","choices":[{"text":"Neutral
","value":"A"},{"text":"Negatively charged
","value":"B"},{"text":"Positively charged
","value":"C"},{"text":"Either, a, b or c
","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":170373,"question":"A positive electric charge:
","choices":[{"text":"Attracts other positive charge
","value":"A"},{"text":"Repels other positive charge
","value":"B"},{"text":"Attract a neutral charge
","value":"C"},{"text":"Repels a neutral charge
","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":170368,"question":"The refractive index of ice is:
","choices":[{"text":"1.00
","value":"A"},{"text":"1.33
","value":"B"},{"text":"1.31
","value":"C"},{"text":"2.42
","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":170367,"question":"Optical fibres works on the principle of:
","choices":[{"text":"Reflection
","value":"A"},{"text":"Refraction
","value":"B"},{"text":"Total internal reflection
","value":"C"},{"text":"Diffraction
","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":170365,"question":"The value of refractive index of water is:
","choices":[{"text":"2.33
","value":"A"},{"text":"1.36
","value":"B"},{"text":"1.33
","value":"C"},{"text":"1.39
","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":170363,"question":"Which animal have ability to move his eye lens:
","choices":[{"text":"Snake
","value":"A"},{"text":"Fish
","value":"B"},{"text":"Ant
","value":"C"},{"text":"Tiger
","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":170361,"question":"In compound microscope, the objective have focal length than\r\neye-piece:
","choices":[{"text":"Smaller
","value":"A"},{"text":"Larger
","value":"B"},{"text":"Equal
","value":"C"},{"text":"Equal and larger
","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":170360,"question":"A converging lens becomes a magnifying glass when an object\r\nis placed:
","choices":[{"text":"Outside of focal length
","value":"A"},{"text":"Inside the focal length
","value":"B"},{"text":"Equal of focal length
","value":"C"},{"text":"At double of focal length
","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":170359,"question":"The speed of light in water is:
","choices":[{"text":"2.0x103 ms-1
","value":"A"},{"text":"2.5x103 ms-1
","value":"B"},{"text":"2.3x108 ms-1
","value":"C"},{"text":"2.3x10-8 ms-1
","value":"D"},{"value":"E"}],"correctAnswer":3}]