UTME Prep Physics

Mechanics: What is the formula for calculating acceleration?

• acceleration = (force) / (mass)

• acceleration = (velocity) * (time taken)

• acceleration = (change in velocity) / (time taken)

• acceleration = (distance) / (time taken)

Mechanics: What is the principle of conservation of momentum?

• Total momentum of an isolated system remains constant if no external forces act on it.

• Momentum is not conserved in an isolated system

• Momentum increases with external forces

• Momentum decreases with external forces

Thermodynamics: What is the first law of thermodynamics?

• Energy can only be transformed into matter

• Energy can be destroyed completely

• Energy can be created out of nothing

• Energy cannot be created or destroyed, only transformed from one form to another.

Thermodynamics: What is the difference between heat and temperature?

• Heat is the same as temperature

• Heat is the transfer of energy from a hotter object to a cooler one, while temperature is a measure of the average kinetic energy of the particles in a substance.

• Temperature is the transfer of energy from a hotter object to a cooler one

• Heat is a measure of the average kinetic energy of the particles in a substance

Electricity: What is Ohm's law?

• The resistance of a conductor is inversely proportional to the voltage across the two points

• The resistance of a conductor is directly proportional to the current through the conductor

• The voltage across a conductor is directly proportional to the current through the conductor

• The current through a conductor is directly proportional to the voltage across the two points

Electricity: What is the difference between series and parallel circuits?

• In a series circuit, the current has multiple paths to flow through different branches, while in a parallel circuit, the current flows through all components.

• Series circuits have multiple paths for the current to flow through different branches, while parallel circuits have the current flowing through all components.

• There is no difference between series and parallel circuits, they both function in the same way.

• The current flows through all components in a series circuit, while in a parallel circuit, the current has multiple paths to flow through different branches.

Optics: What is the difference between concave and convex lenses?

• Concave lenses are flat on both sides

• Convex lenses are thinner at the center and thicker at the edges

• Concave lenses are thinner at the center and thicker at the edges, while convex lenses are thicker at the center and thinner at the edges.

• Concave lenses are thicker at the center and thinner at the edges

Optics: What is the law of reflection?

• The angle of incidence is equal to the angle of reflection

• The angle of reflection is less than the angle of incidence

• The angle of incidence is greater than the angle of reflection

• The angle of reflection is perpendicular to the angle of incidence

Modern Physics: What is the theory of relativity?

• A theory that explains the behavior of light in different mediums

• A fundamental theory in physics that describes the relationship between space and time.

• A theory that describes the behavior of subatomic particles

• A theory that explains the relationship between mass and energy

Modern Physics: What is the photoelectric effect?

• The photoelectric effect is the emission of neutrons from a material when it is exposed to light of a certain frequency.

• The photoelectric effect is the emission of protons from a material when it is exposed to light of a certain frequency.

• The photoelectric effect is the emission of electrons from a material when it is exposed to light of a certain frequency.

• The photoelectric effect is the emission of photons from a material when it is exposed to light of a certain frequency.