Explanation

The transfer of thermal energy from one substance to another that requires no physical medium is called radiation.

Radiation is the process by which thermal energy (heat) is transferred through electromagnetic waves, such as infrared radiation. 

They can occur in a vacuum, such as in the transfer of heat from the Sun to the Earth.

Unlike conduction and convection, which require a physical medium (solids, liquids, or gases), 

Explanation

Energy and work have the same dimensional formula, $$[ML2T−2][ML^2T^{-2}]

Both represent the ability to perform work or cause a change in energy.

Explanation

Internal energy is primarily a function of temperature.

For a given substance, internal energy (U) is related to the temperature of the system, as it reflects the kinetic and potential energy of the molecules.

Explanation

 A DIAC is a full-wave or bi-directional semiconductor switch that can be turned on in both forward and reverse polarities.

Explanation

In pair production, several quantities are conserved

Let's evaluate each option:

- Charge:

A charge is conserved in pair production, as the total charge before and after the interaction remains the same

Due to the opposite but equal charges of the electron and positron.

- Energy:

Energy is conserved in pair production, with the total energy before the interaction equal to the sum of the energies of the electron and positron after the interaction.

- Linear Momentum:

Linear momentum is conserved in pair production, with the total momentum before the interaction equal to the sum of the momenta of the particles involved.

Explanation

 An electric generator is a device that converts mechanical energy into usable electrical energy.

This process is based on the principle of electromagnetic induction,

Discovered in 1831 by British scientist Michael Faraday

Explanation

• Renewable sources, such as solar energy, wind energy, hydro energy, and biomass, are sustainable and can be replenished naturally.
• They can be used over and over again, making them virtually unlimited.

Explanation

• Non-renewable sources, such as fossil fuels (coal, oil, and gas), nuclear energy, and minerals.
• They are limited in supply and cannot be replenished in a short period of time.
• Once they are used, they are gone forever.

Explanation

• The fuel in a car tank is a form of chemical energy, which is stored in the bonds of the fuel molecules (gasoline or diesel).
• This chemical energy is converted into other forms of energy (such as thermal and kinetic energy) through the process of combustion in the engine.

Explanation

• The fuel (gasoline or diesel) in a car is a form of chemical energy, which is stored in the bonds of the fuel molecules.
• When the fuel is burned in the engine, this chemical energy is converted into kinetic energy (the energy of motion) through a series of processes, including combustion, transmission, and propulsion.