An electric circuit can be formed either by series or parallel connection of its components. Flowing current needs a closed path.
If we connect battery , bulb and one more bulb back to back , a resistor ( optional ) , a switch ( optional ) in one line with wires then it is a series circuit.
I said flowing current needs closed path. If we keep open the switch what does it mean?
Now the circuit is not closed. Current starts from positive side of battery , then it reaches the bulbs , after that if there is resistor connected to that , after that it reaches the switch.
Now the switch is open. Circuit is not closed. Hence current will not complete its path. Thats why bulbs will not glow.
Suppose , if the switch is closed then current completes its path. Bulbs will glow.
It is a series circuit. Here the current across the components ( bulbs, resistor ) is same. But the voltage across them changes. The total voltage is the added sum of voltages across bulbs and resistors. Current has single path to flow here.
If we connect battery , bulb and one more bulb back to back , a resistor ( optional ) , a switch ( optional ) in one line with wires then it is a series circuit.
I said flowing current needs closed path. If we keep open the switch what does it mean?
Now the circuit is not closed. Current starts from positive side of battery , then it reaches the bulbs , after that if there is resistor connected to that , after that it reaches the switch.
Now the switch is open. Circuit is not closed. Hence current will not complete its path. Thats why bulbs will not glow.
Suppose , if the switch is closed then current completes its path. Bulbs will glow.
It is a series circuit. Here the current across the components ( bulbs, resistor ) is same. But the voltage across them changes. The total voltage is the added sum of voltages across bulbs and resistors. Current has single path to flow here.
