Electrical Properties Quiz

Ohm's Law states that:

• Voltage is inversely proportional to current.
• Current is inversely proportional to resistance.
• Current is directly proportional to voltage.
• Resistance is directly proportional to voltage.

The unit of electrical resistance is:

• Ampere
• Volt
• Ohm
• Watt

Capacitance is a property that relates to:

• The resistance of a material.
• The amount of charge a capacitor can store.
• The rate of change of current in a circuit.
• The inductance of a coil.

The electrical resistivity of metals typically:

• Increases with temperature.
• Decreases with temperature.
• Is independent of temperature.
• Is highest at absolute zero.

In metals, the 'free electron' model is used to explain:

• Insulating properties.
• Magnetic properties.
• Conductive properties.
• Piezoelectric properties.

Fermi energy is:

• The energy of the lowest occupied quantum state at absolute zero.
• The energy difference between the highest and lowest occupied states at absolute zero.
• The total energy of all electrons in a material.
• The energy required to remove an electron from a solid.

What effect do impurities have on the electrical resistivity of metals?

• Decrease resistivity.
• Increase resistivity.
• Have no effect on resistivity.
• Convert the metal into an insulator.

In semiconductors, the energy band gap:

• Is irrelevant for electron conduction.
• Is the same as in conductors.
• Prevents any electron flow.
• Affects the number of electrons available for conduction.

Which material typically acts as an insulator?

• Copper.
• Silicon.
• Aluminum.
• Glass.

What is the primary charge carrier in metals?

• Protons.
• Ions.
• Electrons.
• Holes.