The primary force acting on a rolling object on an incline is gravitational force, which causes it to roll down the incline.

The strong nuclear force is the primary force that holds protons and neutrons together in an atomic nucleus, overcoming the electromagnetic repulsion between protons.

A convex lens converges light rays that are incident on it, focusing them to a point.

A diode is designed to allow current to flow in one direction only, making it essential for rectification in circuits.

Semiconductors are materials that can control electrical current, allowing them to function in various electronic devices by acting as either conductors or insulators depending on conditions.

Current flow in a semiconductor diode is due to both electron flow and hole flow, as both types of charge carriers contribute to the overall current.

The primary mechanism of heat transfer in fluids is convection.

In solids, heat is primarily transferred through conduction, where thermal energy is passed through collisions between particles.

Bohr's model states that electrons move in fixed orbits with quantized energy levels around the nucleus.

Nuclear fission is the process in which a heavy nucleus splits into two or more lighter nuclei, accompanied by the release of energy.

The Doppler effect is primarily due to the change in wavelength as the source moves relative to the observer.

Gases expand to fill their containers because their molecules are in constant random motion, colliding with the walls of the container.

The principle behind a transformer is electromagnetic induction, where a changing magnetic field induces an emf in a secondary coil.

Einstein's theory of special relativity is based on the postulate that the speed of light in a vacuum is constant and is the same for all observers, regardless of their relative motion.

A convex lens converges light rays that are incident on it.

A diffraction grating operates on the principle of interference, where light waves passing through multiple slits create a pattern.

Einstein's principle of relativity states that the laws of physics are invariant in all inertial frames of reference, meaning they hold true regardless of the observer's state of motion.

Einstein's principle of relativity states that the laws of physics are invariant in all inertial frames of reference, meaning they apply equally regardless of the observer's state of motion.

The principle of relativity states that the laws of physics are invariant in all inertial frames of reference, meaning they hold true regardless of the observer's state of motion.

Nuclear fission is the process in which a heavy nucleus splits into smaller nuclei, releasing a significant amount of energy.

Radioactive decay is the process by which an unstable nucleus emits radiation in the form of alpha, beta, or gamma rays.

Doping is the process of adding impurities to a semiconductor to modify its electrical properties, enhancing its conductivity.

The refractive index n is calculated as n = c/v, which gives n = (3 x 10^8)/(2 x 10^8) = 1.5.

Ohm's Law states that current is equal to voltage divided by resistance, I = V / R.

The relationship between force, mass, and acceleration is given by Newton's second law: F = ma.

Frequency is the reciprocal of the period, so Frequency = 1/Period.

Frequency and wavelength are inversely proportional; as frequency increases, wavelength decreases.

Frequency and wavelength are inversely proportional; as frequency increases, wavelength decreases.

Gravitational force is inversely proportional to the square of the distance between the centers of the two masses.

Heat transfer through conduction is directly proportional to the temperature difference between the ends of the conductor.