# Physics M/J 07 QP1

#### Ismail Breiwish

Number 31 please. A thorough explanation would be appreciated.

#### larina

when switch S is closed the electromagnet(in the relay) becomes magnetised thus allowing the contacts to come closer.
lamp 1 turns ON cuz the current flows through it AND lamp 2 also turns 0N bcuz the current flows through it by the ''relay'' and their is a closed circuit

so both lamps will light....so it is (A).

#### Ismail Breiwish

larina said:
when switch S is closed the electromagnet(in the relay) becomes magnetised thus allowing the contacts to come closer.
lamp 1 turns ON cuz the current flows through it AND lamp 2 also turns 0N bcuz the current flows through it by the ''relay'' and their is a closed circuit

so both lamps will light....so it is (A).
Yeah, I understand that, but I'm still unsure as to the nature of the change that the second circuit goes through. So when the electromagnet becomes magnetized it attracts both parts ends of the switch, which eventually come in contact with each other?