Yes, it should be.
The letter L (written in uppercase) is used as a symbol for inductance. If you mean the letter I (uppercase i), that refers to current.
A lowercase letter is a letter of the alphabet that appears in lowercase form, as opposed to uppercase. It is typically smaller in size and used in writing to differentiate it from its uppercase counterpart.
An "uppercase" letter is also called a "capital" letter. These are the letters used at the beginning of a sentence or the first letter of proper nouns (names of people and places). The uppercase/capital letters in English are:ABCDEFGHIJKLMNOPQRSTUVWXYZUppercase letters are the opposite of the lowercase letters, which are:abcdefghijklmnopqrstuvwxyz
The uppercase letter "I" is used for DC current, or for the average current; the lowercase letter "i" is used for instantaneous current.
I believe that's a block letter or like others say; capital letter.
English Alphabet may be written in two cases: Upper Case & Lower Case. In Upper Case we write like this: A,B,C,.....,Z while in Lower Case we write like this: a,b,c,......,z
A is an uppercase character... Unless you mean to look for an "uppercase 1." In that case, there is no actual uppercase 1 or lowercase 1. 1 is just 1. If you want to switch it up though, you could use "I" (the Roman Numeral for 1) or its lowercase equivalent "i."
Lambda is a Greek letter (uppercase Λ, lowercase λ) used in physics (particularly optics, electromagnetism and Spectroscopy). It is a figure used for wave length.
In American Sign Language (ASL), there are no uppercase or lowercase letters. Instead, fingerspelling is used to spell out words letter by letter using handshapes representing the corresponding letters of the alphabet. The size or orientation of the handshapes do not indicate capitalization.
alien
Uppercase and lowercase delta are used in different contexts. For example, the uppercase delta, which looks like a triangle, is often used to indicate a difference in some quantity (for example, when a quantity increases or decreases over time). More details here: http://en.wikipedia.org/wiki/Delta_(letter)#Math_and_science
The 21st Greek letter is Phi, which has the symbol Φ in uppercase and φ in lowercase. It is often used in mathematics and physics to represent a variety of concepts such as the golden ratio and wave functions.