Question 1
It is observed that when a magnet breaks up into two, each of the pieces retains the characteristics of the original magnet. Explain
Answer
- A magnet is made up of smaller regions (Domains) which contain smaller magnets called dipoles Breaking does destroy the domain
Question 2
What is the advantage of using a pin hole camera over the ordinary camera?
Answer
- Image formed does not require developing
- Does not require focusing.
- Does not require focusing.
Question 3
State two major defects of a simple cell
Answer
Polarization and local action
Question 4
A girl looks into a plane mirror 3 m in from her and sees the image of the wall which is 2.5m behind her. What is the difference between the girl’s eyes and the image of the wall?
Answer
Total distance between object O (wall) and mirror is (2.5 + 3)m = 5.5 m
Object distance = image distance
Hence distance from eye of the girl
= 5.5. + 3 = 8.5 m
Object distance = image distance
Hence distance from eye of the girl
= 5.5. + 3 = 8.5 m
Question 5
Figure 1 shows an object at the bottom of a water container. Draw rays on the diagram to show the object as viewed from above.
Answer
