[{"id":155429,"question":"When the same object is viewed at a shorter distance, the image on the retina of the eye is _____ the so the object appears:","choices":[{"text":"Greater, smaller","value":"A"},{"text":"Smaller, smaller","value":"B"},{"text":"Smaller, larger","value":"C"},{"text":"Greater, larger","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":155428,"question":"A virtual image is formed when object is placed:","choices":[{"text":"Within focal length of a convex lens","value":"A"},{"text":"Near the focal point of a concave lens","value":"B"},{"text":"Both A and B","value":"C"},{"text":"Away from 2F of a convex lens","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":155427,"question":"For the virtual image, option _______ is not correct:","choices":[{"text":"1/p = 1/f -1/q","value":"A"},{"text":"1/f = 1/p -1/q","value":"B"},{"text":"1/p=1/p-1/f","value":"C"},{"text":"1/p=1/f+1/q","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":155426,"question":"A ray passing through optical center of a lens, after refraction:","choices":[{"text":"Passes through focus","value":"A"},{"text":"Go deviated ","value":"B"},{"text":"Retraces its path","value":"C"},{"text":"Both B and C","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":155425,"question":"If the object and its image are located at a distance of 5 cm from the focus of a convex lens, the focus length of the lens will be:","choices":[{"text":"5 cm","value":"A"},{"text":"10 cm","value":"B"},{"text":"20 cm","value":"C"},{"text":"25 cm","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":155424,"question":"Conventionally, all the distance p, q, f are measured from _____ of the lens:","choices":[{"text":"Focus","value":"A"},{"text":"Optical center","value":"B"},{"text":"Edges","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":155423,"question":"Least distance of distinct vision of an old man possibly becomes:","choices":[{"text":"A little less than 25 cm","value":"A"},{"text":"A little more than 25 cm","value":"B"},{"text":"Much less than 25 cm","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":155422,"question":"The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths:","choices":[{"text":"Greater than","value":"A"},{"text":"Less than","value":"B"},{"text":"Equal to","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":155421,"question":"If the focal length of the convex lens is 5 cm, then to get the real and inverted image of the same size as that of object, the object should be placed at:","choices":[{"text":"15 cm","value":"A"},{"text":"10 cm","value":"B"},{"text":"20 cm","value":"C"},{"text":"5 cm","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":155420,"question":"If the focal length of the convex lens is 5 cm, then to get the real and inverted image of the same size as that of object, the object should be placed at:","choices":[{"text":"5 cm","value":"A"},{"text":"20 cm","value":"B"},{"text":"10 cm","value":"C"},{"text":"15 cm","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":155418,"question":"How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper:","choices":[{"text":"The upper half of the image is cut off","value":"A"},{"text":"The brightness of the image is reduced","value":"B"},{"text":"The brightness of the image is increased","value":"C"},{"text":"No effect at all","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":155416,"question":"If the object is situated at focus of a convex lens, then its image is formed at:","choices":[{"text":"F","value":"A"},{"text":"2F","value":"B"},{"text":"Infinity","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":155414,"question":"When the object lies between F and 2F, the image formed by is formed at:","choices":[{"text":"Virtual","value":"A"},{"text":"Diminished","value":"B"},{"text":"Erect","value":"C"},{"text":"Real","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":155413,"question":"When the object lies between F and 2F, the image formed by is formed at:","choices":[{"text":"Real","value":"A"},{"text":"Virtual","value":"B"},{"text":"Diminished","value":"C"},{"text":"Erect","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":155412,"question":"A convex lens acts as diverging lens when the object is placed:","choices":[{"text":"Beyond 2F","value":"A"},{"text":"At 2F","value":"B"},{"text":"With focal length","value":"C"},{"text":"Between F and 2F","value":"D"},{"value":"E"}],"correctAnswer":3}]