Question

measure the resistance of a bulb(filament) in open with multimeter make a circuit with elements are just bulb battery of 12V and keys in series close the key then again measure the resistance of the same bulb(filament) for every 30 seconds record the observation in a proper table what can you conclude from the above results

Answer 1

360 is the required

Answer 2

Answer:

When the bulb is connected in a circuit and key is closed the resistance increase for

every 30 seconds.

Conclusion:

1. The potential difference never changes in open circuit and closed

circuit. The resistance of conductor increases when temperature of conductor increases.