To play the E7 chord, place the index finger on the 1st fret of the top g-string, middle finger on the 2nd fret of the C-string, and ring finger on the 2nd fret of the bottom A-string. Let the other string ring open.
E7 Ukulele Chord Explanation
The E7 chord contains the notes E-G#-B-D.
To build an E7 chord, take the dominant seventh formula (1-3-5-b7) and apply it to the E major scale (E, F#, G#, A, B, C#, D#).
Identify the first, third, fifth, and flat seventh scale degrees in the E major scale which are E-G#-B-D.
Notice how the seventh scale degree found in the chord is lowered a half step as indicated by the "flat" or "b" that precedes the number "b7". In this case, the seventh scale degree of an E major scale – a "D#" note is lowered a half step to a "D" note to make the chord a dominant seventh chord.
Watch the following video to learn how to play an E7 chord on ukulele.