Physics Flashcards

According to Newton's Second Law of Motion, what happens to acceleration if the net force is doubled while mass remains constant?

Answer: Acceleration is doubled

Newton's Second Law states F = ma. If force doubles and mass stays constant, acceleration must also double since a = F/m.

What is the SI unit of electrical resistance?

Answer: Ohm

The ohm (Ω) is the SI unit of electrical resistance, named after Georg Simon Ohm. It is defined as the resistance between two points when one volt produces one ampere of current.

What type of energy transformation occurs in a solar panel?

Answer: Light (radiant) to electrical

Solar panels (photovoltaic cells) convert light energy (electromagnetic radiation from the sun) into electrical energy through the photovoltaic effect.

What is the speed of a car that travels 150 km in 3 hours?

Answer: 50 km/h

Speed = distance / time = 150 km / 3 hours = 50 km/h.

Which of the following is an example of a longitudinal wave?

Answer: Sound wave

Sound waves are longitudinal waves where the particles of the medium vibrate parallel to the direction of wave propagation, creating compressions and rarefactions.

What is the relationship between wavelength and frequency for electromagnetic waves?

Answer: They are inversely proportional (wavelength × frequency = speed of light)

For electromagnetic waves, c = λf, where c is the speed of light (constant). As frequency increases, wavelength decreases proportionally, making them inversely proportional.