Question

what mark or marks are used to indicate a negative battery post?
both the color black and the + (plus sign)
color black
+ (plus sign)
both the color black and the - (minus sign)

• (minus sign)

Explanation:

In electrical systems, the negative battery post is typically indicated by the color black and/or the - (minus sign). The + (plus sign) indicates the positive post.

Answer:

Both the Color Black and the - (minus sign)