Physics MCQs
Topic Notes: Physics
MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.
Plato
- Biography: Ancient Greek philosopher (427–347 BCE), student of Socrates and teacher of Aristotle, founder of the Academy in Athens.
- Important Ideas:
- Theory of Forms
- Philosopher-King
- Ideal State
151
Which combination of camera aperture and shutter speed results in the greatest total light exposure?
Answer:
f-22, 1/60
Exposure is determined by the product of aperture area and time. While f-22 is a small aperture, the shutter speed of 1/60s is significantly longer than the others. Calculating the relative light values shows that 1/60s at f-22 allows more total light than the other options provided.
152
When a magnifying glass is used as a simple magnifier, what type of image is produced?
Answer:
larger than the object
A magnifying glass is a convex lens used to view objects placed within its focal length. When the object is between the lens and the focal point, the lens produces a virtual, erect, and magnified image. This allows the observer to see a larger version of the object, which is the fundamental principle behind simple magnification.