Question

a)Take a battery and measure the potential difference. Make a circuit and measure the
potential difference when the battery is connected in the circuit. Is there any difference in
potential difference of battery? (AS4)
b)Measure the resistance of a bulb (filament) in open circuit with a multi-meter. Make a
circuit with elements such as bulb, battery of 12V and key in series. Close the key. Then
again measure the resistance of the same bulb (filament) for every 30 seconds. Record the
observations in a proper table. What can you conclude from the above results? (AS4)​

Answer 1

Answer:

a) No,we don't find any in potential difference in either case

b) when the bulb is connected in a circuit and key is closed resistance increase for every 30 seconds

OBSERVATIONS :

The potential difference never changes in open circuit and closed circuit.The resistance of conductors increases when temperature of conductors increases