{
"title": "Physics Booster: Convex Lens PYQ High-Yielding Test Set (7 Questions)",
"category": "Mock Test",
"duration": 7,
"schema": {
"@context": "https://schema.org",
"@type": "Exam",
"name": "Physics Booster: Convex Lens PYQ High-Yielding Test Set",
"description": "A high-yield previous year question booster containing 7 short multiple-choice questions covering real/virtual image formation, focal trends, and mathematical conventions of convex lenses.",
"educationalLevel": "Competitive Exam",
"learningResourceType": "Mock Test",
"assessmentType": "Multiple Choice Questions",
"numberOfQuestions": 7,
"timeRequired": "PT7M",
"subject": "Physics - Convex Lens PYQs"
},
"questions": [
{
"text": "When an object is placed at infinity in front of a convex lens, the image formed is located at:",
"options": ["Twice the focal length (2F)", "The principal focus (F)", "The optical center (O)", "Between the focus and the optical center"],
"ans": 1,
"topic": "Image Location",
"explanation": "Light rays coming from an object at infinity run parallel to the principal axis and cleanly converge precisely at the principal focus after refracting through a convex lens."
},
{
"text": "Describe the orientation and nature of the image formed by a convex lens when an object is placed at infinity.",
"options": ["Virtual, erect, and magnified", "Real, inverted, and point-sized", "Virtual, erect, and diminished", "Real, erect, and same size"],
"ans": 1,
"topic": "Image Characteristics",
"explanation": "An object at infinity produces parallel incident rays which a convex lens converges to form a real, inverted, and highly diminished (point-sized) image at the focal plane."
},
{
"text": "To produce a real, inverted image of the exact same size as the object using a thin convex lens, the object must be positioned:",
"options": ["At the principal focus (F1)", "Between F1 and 2F1", "At twice the focal length (2F1)", "Beyond 2F1"],
"ans": 2,
"topic": "Image Positioning",
"explanation": "When an object is placed at exactly twice the focal length (2F1) of a convex lens, the refracted rays cross to form an inverted real image of identical size at 2F2 on the opposite side."
},
{
"text": "Under what condition does a single convex lens form a virtual, erect, and magnified image?",
"options": ["When the object is placed beyond 2F1", "When the object is placed exactly at F1", "When the object is between the focus (F1) and the optical center (O)", "When the object is at infinity"],
"ans": 2,
"topic": "Image Characteristics",
"explanation": "If an object is brought inside the focal length (between F1 and O), the rays emerging from the lens diverge. Back-tracing them creates a virtual, upright (erect), and magnified image on the same side as the object."
},
{
"text": "As an object is steadily moved from a distance beyond 2F closer toward the focus of a convex lens, what happens to the real image on the other side?",
"options": ["It becomes smaller and moves closer to the lens", "It becomes larger and moves farther away from the lens", "It stays the same size but turns virtual", "It moves directly to the optical center"],
"ans": 1,
"topic": "Movement of Objects",
"explanation": "Moving the object closer to the lens focus shifts the intersection point of the refracted rays further outwards, making the real image grow continuously larger and move away from the lens."
},
{
"text": "According to the Cartesian Sign Convention, the focal length (f) of a converging (convex) lens is always considered to be:",
"options": ["Negative", "Positive", "Zero", "Variable depending on object distance"],
"ans": 1,
"topic": "Sign Convention",
"explanation": "Because the primary parallel rays converge on the opposite side of the lens along the direction of the incident light, the focal distance is measured along a positive axis."
},
{
"text": "What does a negative value for calculated linear magnification (-m) signify for an image formed by a convex lens?",
"options": ["The image is virtual and erect", "The image is real and inverted", "The lens power is negative", "The object is inside the focus"],
"ans": 1,
"topic": "Magnification Parameters",
"explanation": "Magnification is given by the ratio of image height to object height. An inverted image points downwards below the principal axis (negative height), giving the overall magnification a negative sign, which confirms a real and inverted image setup."
}
]
}
This is a high-yield 7-question PYQ booster set designed to reinforce key concept points on the Convex Lens. Copy and paste this code into your Blogger HTML view to expand your exam information module.