The earth wire of an electric appliance should be connected to the ________.
(A) Fuse
(B) Metal case
(C) On/Off switch
(D) Plastic handle
Ans 1:
Class : Class 9
The answer is B as metal case is only conductor and if fuse is connected it would be blown off
Ans 2:
Class : Class 10
the answer should be b because the earth wire should be connected to the metal case. Current caring wire should be connected with the fuse.
Ans 4:
Class : Class 2
I think the answer should be B - if earth wire is connected to the fuse (which will burn out after a certain threshold of current passes thru' it) , it will not prevent a shock.
Ans 5:
Class : Class 3
Earth wire is always to prevent from electric shock when metal case comes in live wire, in that case current flow to earth and it prevents electric current pass through human body