11th Grade Physics Quiz

Velocity is a vector quantity because it has both magnitude and direction, whereas the other options are scalar quantities with only magnitude.

In a hydroelectric power plant, the gravitational potential energy of water is converted into kinetic energy as it flows down, and then into electrical energy via turbines and generators.

The frequency and wavelength of a wave are inversely proportional to each other. This relationship is given by the wave equation v=fλ, where vvv is the speed of the wave.

According to Ohm’s Law ( V=IR) if the resistance R is doubled and the voltage V remains the same, the current III must be halved.

At the highest point in its trajectory, the object’s velocity is zero, but its acceleration is still 9.8m/s2 downward due to gravity.

Newton’s Third Law of Motion states that for every action, there is an equal and opposite reaction. The rocket pushes exhaust gases downward, and in response, the rocket is pushed upward.

Work is calculated using the formula W=F×d, where F is the force and ddd is the distance. So, W=10 N×3 m=30 J.

The photoelectric effect occurs when light of a certain frequency shines on a metal surface, causing the ejection of electrons. This phenomenon was explained by Einstein and provided evidence for the particle nature of light.

According to the law of conservation of energy, the total energy in a closed system remains constant, meaning energy cannot be created or destroyed, only transformed from one form to another.