Physics Exam Tips Quiz

What is the path difference for constructive interference?

• n plus a half lambda

• 180 degrees

• Zero degrees

• A multiple of the wavelength

In a stationary wave, what is the distance between two adjacent antinodes?

• One-fourth of the wavelength

• Twice the wavelength

• Half of the wavelength

• Equal to the wavelength

What happens to the potential difference across a capacitor as it charges?

• It decreases exponentially

• It remains constant

• It is initially equal to the emf and then decreases

• It is initially zero and increases

How is electric potential defined?

• The work done per unit charge to bring a positive charge from infinity to a point

• The force experienced by a unit charge in an electric field

• The energy stored in a capacitor

• The potential energy of a charged particle in a magnetic field

What is the relationship between wave intensity and distance from the source?

• Directly proportional to the distance

• Directly proportional to the distance squared

• Inversely proportional to the distance squared

• Inversely proportional to the distance