An electric current is a flow of electric charge - Leaving Cert Physics - Question c - 2020

Such a material is called an insulator.

To demonstrate that a material is an electrical conductor:

Apparatus: Set up a basic electrical circuit with a power source (like a battery), an ammeter, connecting leads, and a bulb.

Procedure: Connect the circuit, making sure to include the test material in place of one of the conductors. Place the circuit in contact with the test material.

Observation/Conclusion: If the bulb lights up, it indicates that the material is an electrical conductor.

To find the total resistance for the given resistances in series (6Ω and 8Ω), we use the formula:

$R_{total} = R_1 + R_2 = 6 ext{Ω} + 8 ext{Ω} = 14 ext{Ω}$

Using Ohm's law, the current can be calculated as:

$I = \frac{V}{R} = \frac{12 ext{V}}{14 ext{Ω}} \approx 0.857 ext{A}$

The current flowing in the circuit is approximately 0.857 A.