Question 1
Distinguish between soft and hard magnetic materials
Answer
Soft magnetic material easily magnetized and demagnetized,
Hard magnetic material not easily magnetized and does not lose magnetism easily
Question 2
A metallic body shaped as shown is positively charged and insulated from the ground as shown.
On the figure show the charge distribution
Answer
Question 3
Figure 2 shows three point sources of light with an opaque object placed between them and the screen.
State and explain the nature of shadow formed along BC
Answer
Umbra; - light is totally blocked from reaching the screen
Question 4
Find the maximum number of 75W bulbs that can be connected to a 12A fuse on a 240V mains supply.
Answer
Question 5
The diagram in figure 3 shows an object O placed in front of a converging lens. F and F’ are the principal foci for the lens
The object is now moved along the principal axis until a virtual image is produced.
(i) Draw the object O in the new position along the principal axis.
(ii) Sketch rays to show formation of the virtual image.
Answer
