Resistance and Resistivity Quiz

What is the main topic of the video?

• Calculating resistance and resistivity

• Learning about magnetic fields

• Exploring quantum mechanics

• Understanding electric circuits

Which formula is used to calculate the resistance of a wire?

• Resistance = Resistivity x Length / Area

• Resistance = Power / Voltage

• Resistance = Current x Time

• Resistance = Voltage / Current

What is the resistivity of aluminum used in the first problem?

• 1.68 x 10^-8 ohm meters

• 2.65 x 10^-8 ohm meters

• 3.12 x 10^-8 ohm meters

• 4.00 x 10^-8 ohm meters

In the second problem, what is the diameter of the copper wire?

• 4.5 millimeters

• 2.0 millimeters

• 3.0 millimeters

• 1.5 millimeters

What is the resistivity of copper used in the second problem?

• 3.12 x 10^-8 ohm meters

• 1.60 x 10^-8 ohm meters

• 2.65 x 10^-8 ohm meters

• 1.68 x 10^-8 ohm meters

In the third problem, what is the given resistance of the wire?

• 0.32 ohms

• 3.12 ohms

• 1.2 ohms

• 2.5 ohms

What is the formula to calculate resistivity from resistance, area, and length?

• Resistivity = Resistance x Area / Length

• Resistivity = Voltage x Current / Area

• Resistivity = Length x Area / Resistance

• Resistivity = Power x Time / Length

In the final problem, what is the resistivity of tungsten used?

• 1.68 x 10^-8 ohm meters

• 3.12 x 10^-8 ohm meters

• 2.65 x 10^-8 ohm meters

• 5.6 x 10^-8 ohm meters

What is the calculated cross-sectional area of the tungsten wire?

• 4.00 x 10^-7 meters squared

• 3.12 x 10^-7 meters squared

• 2.65 x 10^-7 meters squared

• 1.75 x 10^-7 meters squared

What is the final diameter of the tungsten wire in millimeters?

• 0.75 millimeters

• 0.45 millimeters

• 0.30 millimeters

• 1.00 millimeters