Physicsmedium · Past Paper
If an object is placed 20 cm from a concave mirror of focal length 10 cm, the image is formed:
AAt 10 cm
BAt 20 cm
CAt infinity
DBetween 10 and 20 cm
✓ Correct Answer: B — At 20 cm
Since u = 20cm and f = 10cm, the object is at C (2f). The image is formed at C.
Share this question
More from Physics
- A device that converts chemical energy into electrical energy is a:
- The property of a material to oppose the flow of current is:
- An electric bulb of 60 W is used for 10 hours daily. How many 'units' of energy are consumed in 30 days?
- Two resistors of 30Ω and 60Ω are connected in parallel and this combination is connected to a 30V battery. What is the current through the 30Ω resistor?
- The sound produced by an object moving with a speed greater than the speed of sound is called: