Subject :NSO Class : Class 6
The given circuit diagram shows four bulbs in a circuit. Where should a switch be installed so that only one bulb can be switched on or off while the others remain lit all the time ?
(A) A
(B) B
(C) C
(D) D
explain it plz
Ans 1:
Class : Class 6
Answer is B,because if we keep switch ahead of bulb b so it will block electrons of B path so the electrons will pass through A,C,D and they will be lit all time .