Inv4.Exp3 Text B

What is the SI unit for electrical current?

• Volt
• Watt
• Ohm
• Ampere

In a series combination, how are circuit elements arranged?

• In parallel paths
• One after another along the same path
• In random order
• In circular patterns

What causes drift velocity in metals?

• Magnetic fields only
• Heat transfer
• Interaction with inner electron clouds in uniform electric field
• Sound waves

What does resistivity measure?

• Current flow
• Material's opposition to current flow
• Voltage drop
• Temperature change

What is unique about cold welding?

• It requires high temperatures
• It uses liquid metals
• It joins metals without heat
• It only works with copper

What is current in electrical terms?

• Flow of charged particles through a conductor
• Flow of heat energy
• Movement of sound waves
• Transfer of light

How is equivalent resistance calculated in a series circuit?

• By multiplying resistances
• By dividing resistances
• By adding resistances
• By squaring resistances

What is produced when the terminals of a battery are connected to two parallel conducting sheets?

• A magnetic field
• A uniform electric field
• A thermal gradient
• An electromagnetic wave

In a conductor, what causes the "electric friction" effect?

• Electron collisions with metal atom electron clouds
• Direct collisions between metal atoms
• Thermal vibrations in the wire
• Magnetic field interference

The drift velocity in a conductor is:

• Always increasing
• Variable and unpredictable
• Zero
• Constant on average