Review Quiz - General Physics

What is the SI unit used to measure resistance?

• Ampere

• Volt

• Ohm

• Watt

What symbol is commonly used to represent electrical resistance?

• R

• V

• I

• Ω

What does electrical resistance oppose in a circuit?

• Voltage

• Magnetic field

• Electric current

• Capacitance

Which formula expresses Ohm’s Law CORRECTLY?

• V = IR

• V = I/R

• R = VI

• I = V + R

What happens when a material has a HIGH resistance?

• It conducts electricity easily

• It allows very little current to flow

• It has high voltage

• It becomes a good conductor

What is resistivity in terms of electrical properties?

• A property affecting resistance

• Resistance per unit current

• Voltage divided by current

• Resistance per unit length

How does the resistivity of metals generally change with INCREASING temperature?

• It decreases

• It remains the same

• It increases

• It becomes zero

Which type of material typically shows increased resistivity when temperature increases?

• Semiconductor

• Superconductor

• Metal

• Insulator

What effect does temperature have on electron movement in metals?

• It increases the number of free electrons

• It reduces collisions between electrons

• It causes more scattering of electrons

• It does not affect electron movement

Which statement is TRUE about the relationship between temperature and resistance in conductors?

• Resistance is not affected by temperature

• Resistance decreases with temperature

• Resistance increases with temperature

• Temperature does not change resistivity