Physicsmedium · Past Paper
If the image distance (v) is 20 cm and object distance (u) is -10 cm for a lens, what is the magnification?
A+2
B-2
C+0.5
D-0.5
✓ Correct Answer: B — -2
Magnification m = v/u = 20 / (-10) = -2. The image is real, inverted, and double the size.
Share this question
More from Physics
- A body is moved from rest along a straight line by a machine delivering constant power. The velocity at time t is proportional to:
- The center of gravity of a uniform rod is at:
- Which of the following v-t graphs represents uniform acceleration?
- What is the tendency of a body to remain at rest or in uniform motion called?
- A train travels at a speed of 60 km/h for 0.52 h, at 30 km/h for the next 0.24 h and then at 70 km/h for the next 0.71 h. What is the average speed of the train?