A physical restriction placed on the quantity of goods that can be imported is
Answer Details
A physical restriction placed on the amount or quantity of goods that can be imported is known as a "quota." Quotas are a type of trade restriction that limits the amount of a specific product that can be imported into a country during a certain period of time. This can be done to protect domestic industries from foreign competition or to prevent the influx of a product that is seen as harmful to public health or safety. In other words, "a quota" is the correct answer.