4 light bulbs are connected in a circut of unknown arrangement.when light bulb a is removd b,c&d go off when ?

Question

light bulb b is removed A is on c is on and d is on.when light bulb c is removed A is on B is on and D is off.when light bulb is removed A is on B is on and C is off.which are the arrangements of the bulbs?are they in series or paralell

Answer 1

4 light bulbs are connected in a circuit of unknown arrangement.

when light bulb A is removed  - B,C, & D off

when light bulb B is removed  - A, C, & D  on

when light bulb C is removed  - A & B on; D  off

when light bulb D is removed - A & B on; C  off

Arrangements of the bulbs?  series or parallel

A is in series with B,C, & D

B is in parallel

C & D are in series with each other, and the series combination is in parallel

Diagram

A

|

|- B ------|

|- C -  D -|