A circuit diagram is shown here. Which of the switches must be closed so that only bulb 2 lights up ?
AP, R and T only
BR and T only
CR, S and T only
DP, Q, R, S and T
A circuit diagram is shown here. Which of the switches must be closed so that only bulb 2 lights up ?
AP, R and T only
BR and T only
CR, S and T only
DP, Q, R, S and T