20.Write the factors on which heating effect of electric current depends.
21.What is fuse? Why MCBs are used in place of fuse?
22.Differentiate between real and virtual image.
23.Write the characteristics of the image formed by a plane mirror.
24.Briefly explain why in ambulance the word ‘AMBULANCE’ is written in a strange
way?
25.Explain the term lateral inversion.
26.Explain the factors responsible for the depletion of water table.
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21: a fuse is an electrical safety device that operates to provide overcurrent protection of an electrical circuitThe resistance, R of the conductor. A higher resistance produces more heat.
22: A real image is formed when rays converge, whereas a virtual image occurs where rays only appear to diverge.
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