Question 11:
What do the following symbols mean in circuit diagrams ?
Lakhmir Singh Physics Class 10
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7
where are the following but yet:-
( • ) :- symbol of key when the circuit is closed
( ) :- symbol of key when circuit is open.
____ :- wire
___|_____ :- cut cross wires
in the ( 1st ) attachment 1st is of cell
2nd is of bulb !!
in the ( 2nd ) attachment 1st is resistant and 2nd is rheostat !!
( • ) :- symbol of key when the circuit is closed
( ) :- symbol of key when circuit is open.
____ :- wire
___|_____ :- cut cross wires
in the ( 1st ) attachment 1st is of cell
2nd is of bulb !!
in the ( 2nd ) attachment 1st is resistant and 2nd is rheostat !!
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Answer:
(i) Variable resistance. (ii) A closed plug key
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