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Subject :NSO    Class : Class 6

Four identical bulbs are connected in circuit as shown here.

When the switch S is closed, which of the bulb(s) will light up?

AB1 only
BB1 and B4 only
CB2, B3 and B4 only
DNone of these


how do i find the reason for the correct answer please

Ans 1:

Class : Class 5
C

Ans 2:

Class : Class 3
C

Ans 3:

Class : Class 6
Answer is C . As you can see the electrons move from negative termina to positive terminal .the short line of battery shows that it is negative terminal and as you know that rubber is insulator of electricity so the electrons could not pass through bulb b¹.

Ans 4:

Class : Class 8

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