The primary source of energy for the Earth is solar energy, which drives weather, climate, and photosynthesis.

The principal quantum number (n) indicates the energy level; for the third energy level, n = 3.

A manometer is used to measure the pressure difference between two points in a fluid.

A photodiode operates on the principle of the photoelectric effect, where light generates electron-hole pairs.

The principle behind a thermos flask is insulation, which minimizes heat transfer.

A hydraulic lift operates based on Pascal's law, which states that pressure applied to a confined fluid is transmitted undiminished in all directions.

A galvanometer works on the principle of the magnetic force acting on a current-carrying conductor placed in a magnetic field.

Bernoulli's Principle states that an increase in the speed of a fluid occurs simultaneously with a decrease in pressure.

Archimedes' Principle states that the buoyant force on an object is equal to the weight of the fluid displaced by the object.

Bernoulli's Principle states that an increase in the velocity of a fluid occurs simultaneously with a decrease in pressure.

The emission of an alpha particle from a nucleus is known as alpha decay.

Convection is the process of heat transfer through a fluid (liquid or gas) due to the movement of the fluid itself.

Beta decay is the process in which a neutron is converted into a proton, emitting an electron and an antineutrino.

The process of heat transfer through direct contact is called conduction.

The process of heat transfer through fluid motion is called convection.

The process of heat transfer through the movement of fluids is called convection.

A vernier caliper is used to measure lengths with high precision.

Reactance (X_L) = 2πfL = 2π(50)(0.1) = 31.4 Ω.

The reactance of an inductor in an AC circuit is given by the formula X_L = 2πfL.

The relationship is given by Q = CV, where Q is the charge, C is the capacitance, and V is the voltage across the capacitor.

The relationship is given by I = Q / t, where I is current, Q is charge, and t is time.

The relationship is given by Ohm's law: I = V/R.

In a uniform electric field, the electric field E is related to the potential difference V and the distance d by the equation E = V/d.

The frequency (f) is the reciprocal of the period (T), given by the formula f = 1/T.

The frequency (f) of a wave is the reciprocal of the period (T), given by the formula f = 1/T.

The frequency (f) is the reciprocal of the time period (T), given by f = 1 / T.

The magnetic field strength around a long straight conductor decreases with distance from the conductor, following the inverse relationship.

In a fluid at rest, pressure increases with depth due to the weight of the fluid above.

For a sinusoidal AC waveform, the RMS value is related to the average value by RMS = Average / √2.

Inductive reactance is directly proportional to the frequency of the AC source.