The conductor is made of aluminum, has a length of 20 cm and a cross-sectional area of 0.2 mm.

| March 15, 2021 | education

The conductor is made of aluminum, has a length of 20 cm and a cross-sectional area of 0.2 mm. The conductor is included in a 40 V DC circuit. How will the resistance of a conductor change if the voltage across it is doubled?

Resistance = voltage divided by current. Since the current strength does not change (from the condition). This means that when the voltage increases by 2 times, the resistance will also increase by 2 times. We find the initial resistance = density of the conductor (the conductor is made of aluminum p = 2700 kg / m cube table value) multiplied by the length of the conductor and divided by the cross-sectional area. We will translate the length into meters 0.2m, as well as the area in meters s = 0.2 * 10 ^ -3. So the Resistance is 2.7 * 10 ^ 6 Ohm, After increasing the voltage by 2 times, the resistance will be 5.4 * 10 ^ 6 Ohm



One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.