What type of current is primarily delivered from a wall outlet?

The type of current primarily delivered from a wall outlet is alternating current (AC). This form of current is characterized by the flow of electric charge that periodically reverses direction. In most residential and commercial buildings, the electricity supplied by utility companies is AC. This is largely due to the efficiency of AC for long-distance transmission, which allows for reduced energy loss compared to other types of current.

Alternating current is suitable for powering homes and appliances, and it operates at a frequency of 60 Hertz in North America and 50 Hertz in many other parts of the world. The alternating nature of the current is also what allows transformers to be used to step voltage levels up or down, providing versatility in electrical distribution.

Other types of current mentioned in the options have different characteristics and are used in specific applications. Direct current (DC) flows uniformly in one direction and is commonly used in batteries and electronic devices. Pulsed current is often used in medical and therapeutic applications. Static current, if referred to as static electricity, typically doesn't involve a flow of current in the traditional sense. Thus, AC's properties and practical applications make it the correct answer for this question.