4th9WksExamReview

Something electricity can't move through is called a(n) ______.

• conductor
• wire
• shoe
• insulator

What is the Voltage of a circuit that has a resistance of 5 Ω and a current of 2 A?

• 25 V
• 10 V
• 2.5 V
• 0.4 V

If the battery produced 12.6 Volts what would be the current flow for a 6 Ohm resistor?

• 2.1 Amps

• 2.4 Amps

• 1.71 Amps

• 15 Amps

The resistance of a circuit with 1 A of current and 30 volts of potential difference is

• 15 Ω

• 30 Ω

• 0.03 Ω

• None of these

Light of a given wavelength is used to illuminate the surface of a metal. However, no photoelectrons are emitted. In order to cause electrons to be ejected, light of __________ should be used.

• lower energy

• higher intensity

• shorter frequency

• higher frequency

The energy of a photon is directly proportional to its _____ and inversely proportional to its ______.

• intensity - speed

• wavelength - frequency

• frequency - wavelength

• intensity - wavelength

CIrcuit elements connected in series have the same

• voltage drop across them.

• current through them.

• power dissipation by them.

• None of the above.

CIrcuit elements connected in parallel have the same

• voltage drop across them.

• current through them.

• power dissipation by them.

• None of the above.

The wave-particle duality of light describes light as...

• a wave only
• a particle only
• both a wave and a particle
• neither a wave nor a particle

Wave -particle duality is supported by...

• electrons behaving as particles with ordinary matter

• electrons behaving as waves when travelling through space

• the photo electric effect

• all of the above