What do the following symbols mean in circuit diagrams?
(i) 
(ii) 
(i) This symbol represents variable resistance or rheostat
(ii) This symbol represents a closed switch or a closed plug key.
11
What do the following symbols mean in circuit diagrams?
(i)
(ii)
(i) This symbol represents variable resistance or rheostat
(ii) This symbol represents a closed switch or a closed plug key.