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 |