Explanation

Explanation

• Red (R) Green (G) and blue (B) colors are known as primary colors of light.
• Because of mixing these three colors we are able to make all possible colors.

Key Point

The primary colors of Pigment is:

• Red
• Yellow
• Blue

Explanation

• The rotation of the Earth on its axis causes day and night.
• As different parts of the planet face towards or away from the Sun.

Explanation

Brittle materials are those that break easily under stress.

Explanation

In gases, heat transfers mainly by convection.

Convection is the process of heat transfer by the actual movement of medium particles.

To some extent, gases also transfer heat by conduction when they are in static conditions.

Explanation

1 kilowatt hour (kWh) = 1000 watts × 3600 seconds

1 kWh = 1,000 × 3,600 = 3,600,000 joules (J)

Explanation

Ibn al Haytham is known as the Father of Optics.

His contributions to the field of optics through his monumental seven-volume work, Kitab al-Manazir (Book of Optics), compiled between 1011-1021 AD.

Explanation

A transistor is a semiconductor component that can be used either as a switch or an amplifier.

It controls the flow of electrical current in a circuit and is fundamental in electronic devices.

Explanation

Electronics is the branch of science that studies the flow and control of electrons, especially in circuits.

It uses active devices (like transistors and diodes) to control electron flow through amplification and rectification.

Explanation

Hydraulic power systems use fluids to transmit power and motion, and the most common fluids used are:

• Water (in hydraulic systems like water supply networks, fire suppression systems, and hydroelectric power plants)
• Oil (in hydraulic systems like heavy machinery, construction equipment, and industrial manufacturing)
• Non-compressible fluids (like hydraulic fluids, brake fluids, and transmission fluids) that are specifically designed for hydraulic systems.