ECONOMICS (CBSE/UGC NET)

Detailed explanation-1: -Security Thread All genuine FRNs, except the $1 and $2, have a clear thread embedded vertically in the paper. The thread is inscribed with the denomination of the note and is visible only when held to light. Each denomination has a unique thread position and glows a different color when held to ultraviolet (UV) light.

Detailed explanation-2: -The pyramid is part of the Great Seal of the United States. The Great Seal was first used on the reverse of the one-dollar Federal Reserve note in 1935. According to the State Department, which is the official keeper of the Seal, the pyramid symbolizes strength and durability.

Detailed explanation-3: -Since then, holograms, also known as diffractive Optically Variable Devices (OVDs), have become one of the most common Level 1 security features on banknotes. They now appear on more than 300 denominations in 97 currencies.

Detailed explanation-4: -It has three key security features that are easy to check: a security thread, portrait watermark, and color-shifting numeral 20. The redesigned $10 note was first issued in 2006. It has three key security features that are easy to check: a security thread, portrait watermark, and color-shifting numeral 10.