Two light bulbs in the circuit have rating $A\,[24\ V, 48\,W]$ and $B\,[24\ V, 36\,W]$ as shown.

817-650

  • A

    When switch is closed bulb $A$ delivers $24\ watt$  $\&$  $B$ delivers $18\ watt$ .

  • B

    When switch is open $A$ delivers $9\ watt$  $\&$  $B$ delivers $12\ watt$ approximately.

  • C

    When switch is open $A$ delivers $24\ watt$  $\&$  $B$ delivers $18\ watt$ approximately.

  • D

    When switch is open $'A'$ delivers $6\ watt$ and $B$ delivers $9\ watt$ approximately.

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