Cycle 5 Practice III

What is the primary function of an electric motor in household appliances?

• To convert electrical energy into mechanical energy

• To convert mechanical energy into electrical energy

• To store electrical energy

• To increase voltage

Which component in power distribution systems is responsible for changing the voltage levels of electricity?

• Generator

• Transformer

• Motor

• Battery

In the context of renewable energy, what is the role of a generator?

• To store energy for later use

• To convert mechanical energy into electrical energy

• To increase the frequency of electricity

• To decrease the amplitude of waves

Describe the motion of a mass attached to a spring when it is displaced from its equilibrium position.

• Circular motion

• Simple harmonic motion

• Linear motion

• Random motion

What type of energy transformation occurs in a pendulum as it swings from its highest point to its lowest point?

• Electrical to mechanical

• Kinetic to potential

• Potential to kinetic

• Chemical to thermal

Which of the following best describes wave propagation in water?

• Transverse waves

• Longitudinal waves

• Surface waves

• Electromagnetic waves

Compare the characteristics of transverse and longitudinal waves.

• Both have particles that move parallel to the direction of wave propagation.

• Transverse waves have particles that move perpendicular to the direction of wave propagation, while longitudinal waves have particles that move parallel.

• Both have particles that move perpendicular to the direction of wave propagation.

• Transverse waves have particles that move parallel, while longitudinal waves have particles that move perpendicular.

Calculate the wave speed if the frequency of a wave is 50 Hz and its wavelength is 2 meters.

• 25 m/s

• 50 m/s

• 100 m/s

• 200 m/s

What is the relationship between frequency and wavelength in a wave?

• They are directly proportional.

• They are inversely proportional.

• They are unrelated.

• They are equal.

Analyze how the amplitude of a wave affects its energy.

• Energy is independent of amplitude.

• Energy decreases as amplitude increases.

• Energy increases as amplitude increases.

• Energy remains constant regardless of amplitude.