Resistance and Ohm's Law

What is the symbol used to represent current density?

• Uppercase J

• Lowercase j

• Uppercase C

• Lowercase c

Which of the following is true about ohmic conductors?

• They have a constant resistance regardless of temperature

• They have zero resistivity

• They follow Ohm's law

• They do not follow Ohm's law

How is resistance typically defined in terms of resistivity?

• Resistance equals resistivity times length times cross-sectional area

• Resistance equals resistivity divided by length times cross-sectional area

• Resistance equals resistivity times length divided by cross-sectional area

• Resistance equals resistivity times cross-sectional area divided by length

What is the unit of resistivity?

• Amperes

• Volts

• Ohm meters

• Ohms

Which property is a characteristic of a material rather than an object?

• Resistance

• Voltage

• Current

• Resistivity

What happens to the resistivity of a conducting material as temperature decreases?

• It increases

• It remains constant

• It decreases

• It becomes infinite

What is the primary effect of resistors on electric potential energy?

• They convert it to kinetic energy

• They convert it to thermal energy

• They dissipate it as sound energy

• They store it as potential energy