General Physics

Gravity is the force that pulls objects towards the center of the Earth.

Copper is a metal and an excellent conductor of electricity due to its free electrons.

Rainbows form when sunlight is refracted and dispersed by water droplets in the atmosphere.

The meter is the SI unit for measuring distance.

Red and blue light combine to produce purple light.

A thermometer measures temperature using a calibrated scale.

Newton is the SI unit of force, named after Sir Isaac Newton.

Acceleration is the rate of change of velocity over time.

Distance is a scalar quantity as it only has magnitude, not direction.

A barometer measures atmospheric pressure using mercury or aneroid cells.

Jupiter's massive size gives it the strongest gravitational pull among the planets.

Power is defined as the rate at which work is done or energy is transferred.

Convex mirrors provide a wider field of view, making them ideal for car side-view mirrors.

Energy is the capacity to perform work.

Violet light has the shortest wavelength in the visible spectrum.

Light travels at approximately 300,000 km/s in a vacuum, the fastest known speed.

Acceleration is the rate of change of velocity with respect to time.

The watt is the SI unit of power, equivalent to one joule per second.

An ammeter measures the flow of electric current in a circuit.

Newton's First Law states that an object in motion stays in motion unless acted upon by an external force.

The ohm is the SI unit of electrical resistance.

A convex lens converges light rays, making objects appear larger.

Hertz is the unit of frequency, representing cycles per second.

Ohm's Law states that voltage (V) is equal to current (I) times resistance (R).

Sound waves require a medium (like air or water) to travel, unlike electromagnetic waves.

A capacitor stores electrical energy in an electric field.

Refraction is the bending of light as it passes from one medium to another.

Electrons are negatively charged particles that orbit the nucleus of an atom.

Mobile phones use microwaves to transmit signals.

Wind energy is renewable as it is naturally replenished.

Reflection of sound is known as an echo.

A prism disperses white light into its component colors through refraction.

A moving electric charge generates a magnetic field, as described by electromagnetism.

Red light has the lowest frequency and longest wavelength in the visible spectrum.

A hydrometer measures the density of liquids.

An echo is a reflection of sound, changing its direction.

The pascal is the SI unit of pressure, equivalent to one newton per square meter.

Friction is the force that opposes the relative motion of surfaces in contact.

Torque is the rotational equivalent of force, causing objects to rotate.

Neutrons, along with protons, are found in the nucleus of an atom.

TV remotes use infrared waves to send signals.

In a series circuit, all components are connected end-to-end, providing a single path for current.

The standard value for acceleration due to gravity on Earth is approximately 9.8 m/s².

Coal is a fossil fuel and a non-renewable energy source.

Work is defined as the product of force and the distance over which it acts.

Ultrasound uses high-frequency sound waves for imaging and other applications.

Potential energy is the energy an object has due to its position or configuration.

Velocity is a vector quantity as it has both magnitude and direction.

Magnetic field lines form continuous closed loops, never starting or stopping.

The kilowatt-hour is a unit of energy, commonly used for electricity consumption.