Please answer this Physics question!!
I want answer to 4th question.
Tell me the correct option and please let me know how to solve this question...
Answers
Answer :-
Option (c)
Explanation :- As we can see in the figure that to start flow of battery it is compulsory to turn on Switch S1 as it complete the whole circuit and also S4 is compulsory for completion of circuit and to light up bulb C Now to Light up Bulb A we have to turn on Switch S2
Please consider diagram for electricity flow
Answer :-
OPTION C
Introduction :
We are given a diagram and we are asked which we are asked to find out which bulb will light when we are asked which switch should we turn on so that Bulb A and C gets lighted up .
Observation :
Our objective is to turn on the bulbs A and C and the bulb B should be off . This means that we must connect the electric circuit between A and C and at the same time we must ensure that the circuit between B and the battery should not be connected .
Note the switches are all closed . So we must open switches . The switch S2 must be open for the Bulb A . Also the switch S1 and S4 should be open for the Bulb C . Hence we should not open the switch S3 because then the bulb b will also be turned on which cannot happen according to the question. Hence our answer will be to open the switches S1 , S2 and S4 only .Thus the answer is OPTION C .