1. Electronics are very popular in Korea.

2. Electronics is very popular in Korea.

(Thank you for your help. Which one is grammatically correct?)

2. Electronics is a singular noun so needs a singular verb.

Both sentences are grammatically correct, but they have slightly different meanings.

1. "Electronics are very popular in Korea." This sentence refers to electronics as a plural noun, suggesting that various types of electronic devices or products are popular in Korea.

2. "Electronics is very popular in Korea." This sentence treats "electronics" as a singular noun, implying that the concept or category of electronics, as a whole, is popular in Korea.

Both sentences are acceptable, but the choice between using "are" or "is" depends on how you want to convey the meaning.

Both sentences are grammatically correct. However, the usage of "electronics" in these sentences differs in terms of meaning and subject-verb agreement.

1. "Electronics are very popular in Korea."
In this sentence, "electronics" is being used as a plural noun. It refers to multiple electronic devices or technologies in general. The verb "are" agrees with the plural subject "electronics."

2. "Electronics is very popular in Korea."
In this sentence, "electronics" is being treated as a singular noun. It is considered as a field or category, rather than individual devices. The verb "is" agrees with the singular subject "electronics."

So, which sentence to use depends on whether you are referring to electronics as individual devices (plural) or the broader category of electronics (singular). Both can be correct, but the meaning changes slightly.