Understanding Intensity and Amplitude

What is the unit of intensity?

• Joules per second

• Watts per meter squared

• Newtons per meter

• Amperes per second

How does the intensity of a wave change if its amplitude is doubled?

• It doubles

• It remains the same

• It quadruples

• It halves

What does the symbol 'A' represent in the context of intensity being proportional to amplitude squared?

• Angle

• Acceleration

• Amplitude

• Area

What is the role of the constant 'k' in the equation I = kA²?

• It denotes the wavelength

• It represents the wave speed

• It is a constant of proportionality

• It is the frequency of the wave

If a wave's amplitude is reduced to half, how does its intensity change?

• It halves

• It remains the same

• It doubles

• It reduces to a quarter

What is the new intensity if the amplitude of a wave is tripled?

• It doubles

• It increases ninefold

• It triples

• It remains the same

How do you calculate the constant of proportionality 'k'?

• By multiplying intensity by amplitude

• By dividing intensity by amplitude

• By multiplying intensity by amplitude squared

• By dividing intensity by amplitude squared

If the intensity of a wave is 100 W/m² and the amplitude is 10 cm, what is the constant 'k'?

• 10

• 1000

• 10000

• 100

What happens to the amplitude if the intensity is reduced to 40 W/m²?

• It remains the same

• It doubles

• It increases

• It decreases

What is the new amplitude if the intensity is 40 W/m² and the constant 'k' is 10000?

• 4 centimeters

• 10 centimeters

• 6 centimeters

• 0.96 meters