Tense, bluesy, and commanding. Wants to resolve to the tonic.
The E Dominant 7th chord (E7) is built on the root note E with component pitches E, G#, B, D. Formula: [0 - 4 - 7 - 10 semitones]. Category: Dominant 7th (4 tones). Primary genres: Blues, Jazz, Rock and Roll, Funk.
Notes in this chord: E - G# - B - D
Use as the V chord to create a strong pull back to your I chord.