Explanation

A solar eclipse can only take place during the phase of the new moon

when the moon passes directly between the sun and Earth and its shadows fall upon Earth's surface.

Explanation

Ambassador Amna Baloch assumed the charge as Foreign Secretary of Pakistan in Sep 2024

Number: 33rd Foreign Secretary

Predecessor: Syrus Sajjad Qazi

Amna Baloch joined the Foreign Services of Pakistan in 1991

Explanation

The most stable metals, such as gold and platinum, do not corrode easily

because they do not lose electrons easily.

while

Metals placed higher in the reactivity series, such as iron, zinc, etc., get corroded very easily

Explanation

The law of inertia is another name for Newton's first law.

'Unless an unbalanced force acts upon it, an object will remain at rest and an item in motion stays in the same direction and speed)'.

Explanation

Isotope of Hydrogen:

Tritium (symbol ³H) is one of the three isotopes of hydrogen. 

Composition:

Its nucleus contains one proton and two neutrons. 

Instability:

The nucleus is unstable and decays by beta decay into helium-3, a stable isotope of helium. 

Radioactivity:

It is a radioactive material with a half-life of approximately 12.3 years. 

Production:

Tritium is produced naturally in the upper atmosphere by cosmic rays and also as a byproduct in nuclear reactors and nuclear weapons.

Explanation

Light Year is the distance that light can travel in one year.

The distance light travels in one year is known as light year.

Explanation

Explanation

Torque is a vector quantity.

The direction of the torque vector depends on the direction of the force on the axis

Explanation

A semiconductor with a large value is called a wide-band-gap semiconductor

Light emitting diode is a 2-lead semiconductor device. 

The name semiconductor comes from the fact that these materials have electrical conductivity between a metal, like copper, gold, etc., and an insulator, like glass.

They have an energy gap of less than 4eV (about 1eV).

Explanation

Red light rays have the lowest frequency and highest wavelength value.

Blue or violet light has the shortest wavelength.