Subject :NSO Class : Class 7
Which of the following is not a source of electric current?
(A) 
(B) 
(C) 
(D) 
Ans 1:
Class : Class 9
Ans 2:
Class : Class 8
ANSWER IS ELECTROMAGNET
Ans 3:
Class : Class 7
Answer d is correct because car batteries provide electricity to the cars,so it is a source of electricity and dry cells is a type of battery commonly used for portable electrical devices. It provide energy to many things which we daily use like TV remotes , rc cars , torches etc .
Dinamo is also a source of electricity . But electromagnet does not provide us electricity/ energy .
Ans 4:
Class : Class 8
D)
Ans 5:
Class : Class 7
dynamo
Ans 6:
Class : Class 7
Ans is D(ELECTROMAGNET)