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Subject :NSO    Class : Class 6

In the given circuit diagram, S1, S2 and S3 are switches.Which of the following switch combinations is correct for the lamp to glow?


S1 S2 S3
A Opened Opened Closed
B Closed Closed Opened
C Opened Closed Opened
D Closed Opened Closed


Ans 1: (Master Answer)

Class : Class 1

D

In the given circuit , the bulb will glow when the circuit will complete.For this to happen switch S3 must be closed .Along with this either or both of switch S1 and S2  should be closed.


Ans 2:

Class : Class 3

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