The charge which is used to produce an electric field is called

D. Test Charge

The charge responsible for creating an electric field is called a D. Test Charge (although this terminology is not the most common).

Here’s a breakdown of the terms:

• Electric Field: This describes the region of influence around a charged object where other charged objects experience a force. It’s not a physical entity itself, but rather a concept to describe the effect of the charge.
• Field Charge: This term isn’t typically used in standard physics vocabulary.
• Electric Intensity: This is another term for electric field, but it emphasizes the strength of the field at a specific point.
• Test Charge: This is a hypothetical charged particle that is used to probe an electric field. By observing the force exerted on the test charge, we can determine the strength and direction of the electric field at that point.

However, it’s more common to simply refer to the charged object itself as the source of the electric field. For example, we might say “the positive charge creates an electric field.”