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An electric cell is connected to the bulb from its one end. The other end of both bulb and cell is open. Given, the connections are correct and bulb and cell both are in working conditions, which among the following will ensure that the bulb will not glow when it is connected across both open ends?

An electric cell is connected to the bulb from its one end. The other end of both bulb and cell is open. Given, the connections are correct and bulb and cell both are in working conditions, which among the following will ensure that the bulb will not glow when it is connected across both open ends? Correct Answer a wooden ruler

Concept:

Electric circuit

  • An electric circuit is the path of an electric current. 
  • The circuit contains a cell or battery, connecting wires, switches, and electrical appliances. 
  • If the switch is ON, the circuit is closed and the current passes. Current will not pass through the circuit when the 
  • When a bulb is connected through the circuit, and it glows, that means the circuit is complete and the current is flowing. 


Good and bad conductors of Electricity

  • Good Conductors are the devices that allow the electric current to pass through them easily. 
  • Examples are metals like copper, silver, iron, etc. 
  • Bad Conductors resist the flow of current across them. 
  • Examples of bad conductors are wood, rubber, plastic etc. 


Explanation:

The circuit shown in the question is according to the below diagram. 

  • According to the question which among the given options, should connect through A and B, so that the connection will not flow and the bulb will not glow.
  • The object should be a bad conductor of electricity. 
  • a wooden ruler is a bad conductor as it is made up of wood. 
  • Other options steel spoon, metallic key, and silver wire are good conductors of electricity. 


So, the correct option is a wooden ruler. 

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