Resistance and Resistivity AS Level Quiz

What is electrical conductivity?

• Ability of a material to store an electric current

• Ability of a material to generate an electric current

• Ability of a material to resist an electric current

• Ability of a material to conduct an electric current

Explain the relationship between electrical conductivity and resistivity.

• Electrical conductivity is inversely related to resistivity.

• Electrical conductivity has no effect on resistivity.

• Electrical conductivity is directly related to resistivity.

• Electrical conductivity and resistivity are completely unrelated.

What are the factors affecting electrical conductivity?

• Pressure, density, and volume

• Color, shape, and size

• Age, weight, and height

• Temperature, material composition, and impurities

Define the term 'Ohm's law' and its significance in electrical conductivity.

• Ohm's law is the relationship between voltage, current, and capacitance in an electrical circuit.

• Ohm's law is the relationship between voltage, resistance, and current in an electronic circuit.

• Ohm's law is the relationship between resistance, power, and frequency in an electrical circuit.

• Ohm's law is the relationship between current, voltage, and resistance in an electrical circuit.

How does the type of material affect electrical conductivity?

• It increases the resistance of the material

• It decreases the voltage in the material

• It has no effect on electrical conductivity

• It affects the movement of electrons within the material.

How does temperature affect the resistance of a conductor?

• Temperature has no effect on the resistance of a conductor

• The resistance of a conductor remains constant regardless of the temperature

• As the temperature of a conductor increases, the resistance decreases

• As the temperature of a conductor increases, the resistance also increases.

Explain the concept of temperature coefficient of resistance.

• The temperature coefficient of resistance measures the color of a material at different temperatures.

• The temperature coefficient of resistance measures how much the resistance of a material changes with changes in temperature.

• The temperature coefficient of resistance measures the weight of a material at different temperatures.

• The temperature coefficient of resistance measures the volume of a material at different temperatures.

What is the difference between positive temperature coefficient and negative temperature coefficient materials?

• Positive temperature coefficient materials have higher resistance

• Negative temperature coefficient materials only work in extreme temperatures

• They both have the same temperature coefficient

• Resistance changes with temperature

Discuss the impact of temperature on the resistivity of a material.

• The resistivity of a material decreases with temperature.

• The resistivity of a material has no relationship with temperature.

• The resistivity of a material remains constant regardless of temperature.

• The resistivity of a material increases with temperature.

How does temperature dependence affect the performance of electrical devices?

• It only affects the appearance of electrical devices.

• It can cause the electrical devices to become more efficient.

• It has no effect on the performance of electrical devices.

• It can affect the resistance and performance of electrical devices.