Explanation

• Thermal energy is the form of energy that is transferred from one body to another due to a difference in temperature, and is received from heat.
• It is the energy of motion of particles in a substance, such as atoms or molecules, and is often referred to as "heat energy".

Explanation

• Gas Giants are large, gaseous planets that are primarily composed of hydrogen and helium, and include Jupiter, Saturn, Uranus, and Neptune.
• They have no solid surface and are characterized by their massive size and atmospheric composition.

Explanation

• When the child rubs the balloons with wool, the balloons become statically charged with the same type of charge (either positive or negative).
• When two objects with the same charge are brought near each other, they repel each other.

Explanation

• When the frequency of the modulated wave is less than the frequency of the carrier wave, it indicates that the input signal is negative.
• This is a characteristic of amplitude modulation (AM) where the input signal is negative, resulting in a decrease in the amplitude of the carrier wave.

Explanation

Glass is an insulator, meaning it does not conduct electricity.

Aluminium, Copper, and Silver are excellent conductors of electricity.

Explanation

Longitudinal Wave (Primary Nature):

Sound propagates as compressions and rarefactions (particles vibrate parallel to wave direction).

Example: Sound waves in air.

Mechanical Wave (Medium Dependency):

Requires a medium (solid, liquid, gas) to travel—cannot propagate in a vacuum.

Transverse Wave (In Specific Cases):

In solids, sound can also exhibit transverse wave components (particles vibrate perpendicular to the wave direction).

Explanation

Sound travels as a longitudinal wave, where particles vibrate parallel to the direction of wave motion.

In contrast, light is a transverse wave, with vibrations perpendicular to the direction of propagation.

Explanation

Work is done when a force causes displacement of an object in the direction of the force.

A man pushing against the wall, although force is applied, the wall does not move, so no displacement occurs → no work is done.

Explanation

Acceleration is related to force, mass, and change in velocity (from Newton’s 2nd Law).

It has no relation with temperature, which is a thermal property.

Explanation